WM Splitter Just Does Not Work

I try triming ASF and WMV files of live streaming video I recorded. when I click on the TRIM button or the OUTPUT folder and name the file a window comes up and says it's triming the file but it does nothing. It satys at 0% and there is no progress bar. I've tried 5 times waiting up to 10 minutes on some attempts but it never starts the process. Can I get some help on this? I'm using the latest downloaded version.
Windows XP SP3/2.16 duo processor/3 gig ram/101 gigs of free space.
Thank you,
Lorey