I'm running DirectRT 2010 (the latest version) and MediaLab 2012 (the latest version).

I have a .exp file that calls up DirectRT several times during the experiment to run some reaction time tests. When I run this file on our computers running Windows XP, it works fine. However, I just installed some new computers with Windows 7. The experiment begins fine, but when it comes time for MediaLab to call up the first DirectRT file, the screen turns blank (the light purple color of the default media lab background) and fails to do anything. Participants cannot advance any further and I have to shut down MediaLab through the task manager.

I thought this might be because I did not have Microsoft Office installed on the computer, but even after installing Office the problem remains.

The experiment works fine when running it on a PC using Windows XP, but "freezes?" when MediaLab tries to call up DirectRT.