Brakes failed to work on ILS landing at KSFO?

Gremlins attacked - my brakes failed and I ran off the runway on an otherwise flawless ILS landing at KSFO after 2 hour flight from KSEA Seattle. Ugh.I have to say1- PMDG aircraft is STELLAR and IMHO is light years better than iFly 737ng in MOST ways. Navigation in the VC could be easier though (product improvement idea?)2- If someone knows about the braking failure I would appreciate help. I had a problem earlier today and exited FSX and had to restart my flight when I could not stop my aircraft during taxiing at KSEA. Yes, another BRAKE failure.3- All tips and ideas appreciated. I just bought this 10/24/2011 I would imagine I have the 'latest/greatest' or do I need to install 'patches'??