Observer Dll Version Mismatch

Hi,

I have a project, which works fine for a client in SAP 2007 PL30.

I'm trying to connect the same project (in debug mode) to another client, who is in 2007A SP00 PL15.

But, I'm getting the error - Observer DLL version mismatch, when I'm trying to connect.

- - -

oCompany.SetSboLoginContext(ocookiecontext)

If oCompany.Connect <> 0 Then

'Error

I guess it is something to do with the version of SAPBOUICOM.Dll, SAPBOBSCOM.DLL in my application.

I tried using both as 2007, also I tried using DI as 2005 and UI as 2007.

Nothing is working.

Please help me with this.

Thanks.

-Geetha