Cannot browse to Web application on Windows Server 2003 64 bit

Hi

We are testing our web application on Windows Server 2003 64 bit. The application itself is a HTML application (.hta) and is 32 bit. I can browse to the web application from a separate client machine (windows xp 32 bit), so the applicatiion is successfully being served out by the Windows Server 2003 64 bit machine. But, the problem is that when I try to browse to the application on the 64 bit machine itself, I get a blank screen with a red cross. What can I do to run the application on the 64 bit server?

Also I would like to add that the application works fine on a Windows Server 2003 32 bit OS.

Any help would be much appreciated.

Thanks

Sumeet