When I click on a column to sort it the Zortam program terminates. This occurs about 90% of the time on my Dell desktop (Windows XP home). About 75% of the time on my Dell laptop with Windows XP home and about 25% of the time on my Dell laptop with XP Pro. Any clue as to why this is happening. I am running SP2 with the all the latest updates on all three machines. I am running Zortam Media Studio Pro 6.85, but this problem has been consistent will all prior releases.