Hey

!
We have a thread going that could help you solve some of the PFLB problems. Check out: So Much Gear So Little Time > Everyone having problems with a Profire Lightbrdge...
There is a M-Audio tech guy helping us there! His name is Calvin. It will hopefully be a great source of solutions. At least go there at post your issues so they can work on them. Just be sure to give DETAILED INFORMATION about every aspect of your setup (clocking, signal flow of audio and sync, OS version, driver version, and on and on.) It is very important to include these details.
Good luck with this frustrating piece of gear...