.exe Won't Run If Made On Wrong Computer

I am working with three computers. A netbook, Desktop A and Desktop B. I have a VB5 program I wrote that, if I do the Make project.exe on Desktop A, the .exe runs fine on the netbook. If I Make the very same project on Desktop B and try to run the .exe I get Error 50003 Unexpected Error.

I am guessing that Desktop B has a different versions .dll or .ocx. I already "upgraded" the netbook with the same versions of:
COMDLG32.ocx
COMCT332.ocx
COMCT232.ocx

Somewhere it said these are frequently the problem but it didn't help me. Yes, I did register them.

Is there a way for me to find out what other .dll or .ocx I might need?

Note, the problem Desktop also has VB.NET installed so I'm guessing it has later versions of a lot of these files.

Thanks In Advance
Pete