Sync problems? do anyone know how to ...

I can't seem to get my mpc 4000 to stay in sync with sonar 3, I was using it fine and all of a sudden since yesterday it just won't stay in sync. When I use sonar as the master the mpc plays at a much faster tempo than it is suppose to and when I use the mpc as the master it slowly drifts out of sync, has anyone experienced this problem or know how to fix it.
Thanks in advance for the help. Peace.

I went back to os version 1.51 and now everything is in sync, I guess I'll just use this until the next update. I love the machine, I hate the bugs especially when there is a paying customer looking at you while you're trying to figure out how to solve problems that you shouldn't even have.