My PAHUD won't open

[prettykitty]

I can't get PA HUD to run on my computer anymore. It used to work fine, I didn't use it for a couple months, and now it won't run at all. When I click on the shortcut (or in the start menu), the little hourglass pops up next to the mouse pointer, and then nothing happens.

I talked to PAHUD support about this, and although they were very helpful, they couldn't come up with anything that got it to work:

PAHUD forum post

I've tried uninstalling, removing the directory, rebooting, etc., but nothing seems to work. I've had a similar thing happen on other computers with other programs, but after rebooting, they always seem to work fine. No such luck with this one.

Is there anything that my computer might be doing which would cause a program to be unable to start up?

Thanks for any help.