Asp.net dll registration problem

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Hi i was using groupwise using asp.net to send email . it was working
perfectly on one server but then i install another server and moved that
website to new server . after moving to new server i am getting that error .
should i need to install groupwise software on that server . cos i tried to
register required dll using regserv32 utility but it also gave me message
that dll is loaded but cannot register .
i dont know what to do

COM object with CLSID {761C954A-BAFD-11CE-B6F9-00608C84E1C4} is either not
valid or not registered.
Description: An unhandled exception occurred during the execution of the
current web request. Please review the stack trace for more information about
the error and where it originated in the code.

Exception Details: System.Runtime.InteropServices.COMException: COM object
with CLSID {761C954A-BAFD-11CE-B6F9-00608C84E1C4} is either not valid or not
registered.

Source Error:


Line 167: //try
Line 168: //{
Line 169: Application2 oGApp=new Application2Class();
Line 170: Message oGMes;
Line 171: Account oGAcc;