Server.execute Permissions On Server

I have a website and use server.execute quite extensively. The website was put into production and at first all worked great.

but some users were getting to my site but an error message would pop up stating page was not loaded properly. TO many users it looks like the website simply does not exsist.

What happens is that when the web page (www.cheapbatterypacks.com/main.asp) gets executed it will fail for "some" people at the server.execute point.

Here is a good example of the problem. In my shop I have 3 computers on the same network. connected to a dsl connection etc. All have internet access all run IE6 etc. 2 will pull up www.cheapbatterypacks.com just fine. but 1 will not. maybe some of you will see the same error.

if you type www.cheapbatterypacks.com/loosecells.asp it will pull up fine but that file is supposed to be loaded by the server.execute function and not run on its own.

so now I am pulling my hair out to try and get these other folks on board and working.

How would something be so selective like this. COuld it be me webserver settings? And even if it was how come it appears to only affect some people.

This is a public website so there are no logins/passwords etc meaning they come in a anonymous and have only read/execute permissions.

I am still running windows 2000 server with all Sp's patches etc. IIS 5.0.