COM object that has been separated from its underlying RCW cannot be used vb.net

Is it possible to reuse the com object that I just released with: Marshal.ReleaseComObject(obj)

When ever I try the following:

dim obj as ObjectType = New ObjectType
Marshal.ReleaseComObject(obj)
obj = nothing
obj = New ObjectType

I get the error: COM object that has been separated from its underlying RCW cannot be used.

Why do I want to do this? - I got the periphery (Xenta payment terminal) that is connected with a com-port & I use a com object to talk with it. - I want to reinitialize the object without restarting the program. A normal: obj = nothing doesn't work. When I try to start the payment I get the following exception: The server threw an exception. (Exception from HRESULT: 0x80010105 (RPC_E_SERVERFAULT))

I was wondering if there was any possibility that I can do that? Or any other suggestions on how to reinitialize my object?

Thanks!