Application Hangs When User Tries to Open a New Window

If a user connecting to RDC using Internet Explorer tries to open a new window and nothing happens, the user may need to increase the number of connections allowed in IE. For instructions from Microsoft, see http://support.microsoft.com/kb/282402#fixit4me. The problem description is about being unable to download only two files at a time, but the fixes described work for the RDC problem.