Retrieving the COM class factory for component with execution 80080005 Server execution failed

When I run my web service on the virtual server generated by visual studio my ws works perfectively but, when I run on IISv6 I got this

<string xmlns="http://www.devworms.com/">
Retrieving the COM class factory for component with CLSID {7F12571F-1A8A-11D3-9225-00105ACA290D} failed due to the following error: 80080005 Server execution failed (Exception from HRESULT: 0x80080005 (CO_E_SERVER_EXEC_FAILURE)).: Retrieving the COM class factory for component with CLSID {7F12571F-1A8A-11D3-9225-00105ACA290D} failed due to the following error: 80080005 Server execution failed (Exception from HRESULT: 0x80080005 (CO_E_SERVER_EXEC_FAILURE)).
</string>

what can i do? I am not using office apis I am using a dll of Aloha (is a POS) I think is an iis issue but i don't know any help??? my code is very simple

Try to Register your database working at like this directory i dont know if, mysql,sql,postgres:

in this path:

C:\Windows\Microsoft.NET\Framework\v2.0.50727\CONFIG\machine.config

check this element >system.data> inside of it.

look like this: