Interop and windows 2003 server

[Carmen]

I have an ASP.NET application that exports some data to Excel via Interop.
The application is working fine in Windows 2000 Server. Now we are changing
our servers and we have installed Windows 2003 Server Enterprise Edition,
the application works fine, but it does not export to Excel. I have looked
into the Task Manager of the Server and I don´t see the Excel.exe process,
so I suppose that it is a privileges problem and the application is not able
to load this process.

Could anyone help me?

Thanks in advance.