Details hmm...there's not too many really.
Double click Icon, Box pops up with the error text, a red circle with a white X in it, and OK button, and the window title is "Anti-Malware Toolkit". I press OK and the toolkit starts, but the drop down and all the boxes are blank except for "Download Path" .
As for .net, 1.1, 2.0 SP2, 3.0 SP2 and 3.5 SP1