IIS Settings?

I have two computers, one PIII 1 Ghz and one PII 300 mhz. On the 1 Ghz I am running Win 2K with IIS and everything works fine (I have an ASP site (30 asp files and 1 htm file) which I have set up on it. I just installed Win 2K on the 300 mhz machine, installed IIS, copied the files from my site
onto the machine, created a virtual directory for it, but when I try and run
it I get a server application error #500. The error happens when I try to view an asp file in the site but not an htm file. I have tried reinstalling IIS and the application, but I get the same result….can anyone help? Thanks.