Tanya,
Perhaps you could open a technical support issue to get this looked at by one of our technicians - we'll be able to do a remote connection, take a look at your files, etc. You can do this
by phone or
through the web .
One thing to check before you call though which is extremely important (in fact, it's critical): make sure you are not running under Windows "Terminal Server" (not to be confused with a simple remote desktop). This is more likely to happen under Windows 2000, 2003 or 2008. To verify this find the "Manage your server" or "Configure your server" icon, which is generally under the start menu, sometimes under control panel. If you have "Terminal Server" under the machine's roles, then there is a good change this would be your issue - Terminal Server is not a supported environment precisely because of these types of issues.
Hope this helps,
Eric.