Linux USB_modeswitch failed to switch my datacard into modem mode

I am using BeagleBoneBlack(BBB) with Linux kernel (3.8.11) & debian File system. When i connect USB datacards(iball Airway 21.6Mpbs) it is showing me as storage device, I wanted it to switch into Modem mode so that i can use as ethX for my SoftWare Application. I came across usb_modeswitch, which has the capabilites to switch USB modes dynamically. But usb_modeswitch exits with error. How do i switch my datacard to operate in Modem Mode? Any points will be highly helpfull. Thanks In Advance. I have attached the logs.. below are the logs: queries:1. Why is my cdc_ether driver getting detached?

2. Am i commiting any mistakes while identifying proper endpoints?

Note: I m not aware how to fetch MessageContent, follwed few links to get MessageContent. Any pointers on this will be helpfull too.

below is modeswitch conf file:

2020:4020

>> cat 2020\:4020 
 this is a test USB Modem
TargetVendor=0x2020
TargetProduct=0x4020
MessageEndpoint=0x01
ResponseEndpoint=0x81
#MessageContent="555342431234567800000000000003f0010100000000000000000000000000"
MessageContent="55534243801BFA061200000080000C03000000120000000000000000000000"

lsusb log:

>>lsusb 
Bus 001 Device 003: ID 2020:4020  
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
>>lsusb -v -d 2020:4020

Bus 001 Device 003: ID 2020:4020  
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               2.00
  bDeviceClass            2 Communications
  bDeviceSubClass         0 
  bDeviceProtocol         0 
  bMaxPacketSize0        64
  idVendor           0x2020 
  idProduct          0x4020 
  bcdDevice            0.01
  iManufacturer           1 Network Connection
  iProduct                2 R360B
  iSerial                 0 
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength          111
    bNumInterfaces          3
    bConfigurationValue     1
    iConfiguration          0 
    bmAttributes         0xc0
      Self Powered
    MaxPower              500mA
    Interface Association:
      bLength                 8
      bDescriptorType        11
      bFirstInterface         0
      bInterfaceCount         2
      bFunctionClass          2 Communications
      bFunctionSubClass       6 Ethernet Networking
      bFunctionProtocol       0 
      iFunction               5 CDC
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           1
      bInterfaceClass         2 Communications
      bInterfaceSubClass      6 Ethernet Networking
      bInterfaceProtocol      0 
      iInterface              3 CDC Ethernet Control Model (ECM)
      CDC Header:
        bcdCDC               1.10
      CDC Union:
        bMasterInterface        0
        bSlaveInterface         1 
      CDC Ethernet:
        iMacAddress                      6 001EA6993A0E
        bmEthernetStatistics    0x00000000
        wMaxSegmentSize               1514
        wNumberMCFilters            0x0000
        bNumberPowerFilters              0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x82  EP 2 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0010  1x 16 bytes
        bInterval               9
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       0
      bNumEndpoints           0
      bInterfaceClass        10 CDC Data
      bInterfaceSubClass      0 Unused
      bInterfaceProtocol      0 
      iInterface              0 
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       1
      bNumEndpoints           2
      bInterfaceClass        10 CDC Data
      bInterfaceSubClass      0 Unused
      bInterfaceProtocol      0 
      iInterface              4 CDC Ethernet Data
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x01  EP 1 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        2
      bAlternateSetting       0
      bNumEndpoints           2
      bInterfaceClass         8 Mass Storage
      bInterfaceSubClass      6 SCSI
      bInterfaceProtocol     80 Bulk-Only
      iInterface              7 Mass Storage
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x83  EP 3 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x02  EP 2 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               1
Device Qualifier (for other device speed):
  bLength                10
  bDescriptorType         6
  bcdUSB               2.00
  bDeviceClass            2 Communications
  bDeviceSubClass         0 
  bDeviceProtocol         0 
  bMaxPacketSize0        64
  bNumConfigurations      1
Device Status:     0x0001
  Self Powered

usb_modeswitch log:

>>lsusb_modeswitch -v 2020 -d 4020 -c /etc/usb_modeswitch.d/2020:4020

Looking for target devices ...
   found matching product ID
   adding device
 Found devices in target mode or class (1)
Looking for default devices ...
   found matching product ID
   adding device
 Found device in default mode, class or configuration (1)
Accessing device 003 on bus 001 ...
Getting the current device configuration ...
 OK, got current device configuration (1)
Using first interface: 0x00
Using endpoints 0x01 (out) and 0x81 (in)
Not a storage device, skipping SCSI inquiry

USB description data (for identification)
-------------------------
Manufacturer: Network Connection
     Product: R360B
  Serial No.: not provided
-------------------------
Looking for active driver ...
 OK, driver found ("cdc_ether")
 OK, driver "cdc_ether" detached
Setting up communication with interface 0
Using endpoint 0x01 for message sending ...
Trying to send message 1 to endpoint 0x01 ...
 Sending the message returned error -2. Trying to continue
Resetting response endpoint 0x81
 Could not reset endpoint (probably harmless): -32
Resetting message endpoint 0x01
-> Run lsusb to note any changes. Bye.

THanks, Vivek T