Delete of snapshot fails?

I was attempting to clean up and remove a number of older snapshots. When the snapshot in question is in the middle of a line of snapshots the system starts to remove it but never finishes. After 10 minutes, I forced Parrallels to quit. I was able to open the VM without a problem but the snapshot still shows in the snapshot manager.

I also attempted to remove another snapshot that was at the end of a line. This removed without a problem. Runtime was about 5 seconds or less.

I am running Parallels desktop 3.0 for Mac build 5160 on OS X 10.4.11

Thanks
Sculler