v2008 freezes

[sadler]

We v2008.1.0.21 with Windows XP. We start DirectRT, select our input file and run. We have to press the space bar to begin and when we do that nothing is presented and the window goes blank and freezes. I saw that there was a freezing issue with v2010 and that I new executeDRT file was recommended. I installed this but then when I select and run an input file, absolutely nothing happens. I am attaching an input file.

Thanks in advance for your help.