Windows 7 ISScript Error

[Kitsune]

1: the InstallScript is missing from this machine. If available, Please run ISScript.msi, or contact your support personell for further assistance.

So this is the error message I get from my computer when I tried to install a program. Is this just because it is not compatable with windows 7 or because it is really missing. Any Ideas about how to fix it?
Thanks...

 

[Broni]

Any particular program, or any program?

 

[Kitsune]

Maya 2010. Is the one I found with the error, but then again I just went and downloaded Maya 2011 off of their website, and it installed fine. So I am thinking that if I want to run programs made for vista I would need the ISScript. Maybe it is not backwards compatable? I also istalled call of duty 4 that I bought when it first came out I installed and I didnt get that error. So maybe there is a problem with certian Programs compatability with Windows 7? Or maybe it is just a windows 7 bug?