Testing Web pages from MII workbench

I am not able to display a web page from the MII workbench when clicking on the Test button. There are users with the same role access as myself that have no problems using the Test button. No page of any kind opens, when attempting to test it.

This is occuring in MII12.2. NW 7.3

I am running IE9.

Has anyone come across this problem before.

Thanks,

Bob Koshalek