get_ParameterInfo issues

Hi,

I'm receiving blank error windows entitled "Testing get_ParameterInfo" after viewing the Validation tab in the Properties window for Python scripts. When inside the script tool window, the first parameter has a X sign while other parameters do not fill in. When I fill the parameters in manually, I receive a blank warning error pop-up.

These scripts seem to run fine on another work computer, which is identical to my own (ArcGIS 10.0 SP5 and Python 2.6.6).