Whenever i run the refplanes script that comes with the Apache modelling tutorial the system just freezes, i still get the audio, but i can not move the mouse, and pressing Ctrl, Alt and Delete has no effect. the system has to be powered off to get it working again.

It freezes at the point where you are asked to hit the Go! button in the script.

My system is as follows:

Dell Precision 530 Dual Processor ZEON
4 Gb RAM
Wildcat 6220 Graphics Card
Windows XP SP 2
Maya 8

Please help as i can not start this tutorial, or can someone tell me how to work around the scrip and reproduce the same as what the script achieves.