Hoster program locks up

[backroads]

4.01--I try to start show, click play- it goes to cue for 5 min+ It will eventually go into play mode and in a couple more minutes it will actually start to play. It will then lock up at 0:00. I click play for next song, 10 mins. later it starts playing. Same thing every time. I upgraded from 3.21 to 4.01 this past weekend. my computer is a Twinhead Laptop that I purchased from MTU about a year ago. -2.13 GHz - 992mb Ram - XP home - IE 7 - SP3. Should I reload 4.01? I am having to use my backup computer with 3.21 for shows now.
Don