Need DECOMPILER for Visual Basic 2 app

I have a VB 2 app written in 1996. I have to rewrite the app in .NET but need all of the calculations and formulas from that app. I have the exe, .vbx, .vbk and dlls for the app. I need to find a decompilier for the application. I have found and tried three but all of them I have found so far are 16 bit applications that either don't install on a 32 or 64 bit Win 7 machine or just don't work. I will pay for the full version of whatever application is available if it works. Anyone have any ideas or links to where I can find one?

Thanks!