First of all, you should immediately upgrade to FoxWeb 2.6.  This version contains some important new features and is a free upgrade for licensees of FoxWeb 2.0 and above.  All you need to do is install it over your existing version.

In order to allow execution of FoxWeb scripts under Windows 2003, you will need to add an application extension in the Internet Services Manager.  The following image illustrates how to do this: