I can't register .tlb file in 64 bit Windows 7 using regsvr32.exe as administrator. I could do it in XP. Now I get error, "The module " ... MyFile.tlb may not be compatible with the version of windos that you are running. Check if module is compatible with an x86 (32-bit) or x64 (64-bit) version of regsvr32.exe." I get this message whether I run the regsvr23.exe in system32 or sysWOW64. This works on XP.