I developed an windows application using VS 2005 in XP with COM, and it has been working fine, but when I try to develop the same functionality in an windows application using VS 2010 in Windows 7, COM reference "PeachTree Accounting 21.0 Type Library" is not listed in Add Reference Dialog box under COM tab. I could add the reference by browsing and selecting Interop.Peachwserver.dll from Sage 50 2014 program folder installed. Then I run the program, it throws an error at LogIn.GetApplication (Sage 50 is opened at this point). I use the same 3rd party name and password. Is there anything that needs to be changed in VS 2010?