SBE Server Error during DVD Burn

  Before Thursday, I was able to burn DVDs fine using the burn engine in MCE.  
I get the following error when burning using MediaCenter: "SBE Server has
encounterd a problem and needs to close".  The burn stalls.  I can exit out
of MCE but the DVD is blank.  I have two PCs with MCE and the same message
appears on both systems (one is a TSST DVD+-RW H553-A and the other is a
PHILIPS DVD+-RW DVD8631).  Any ideas as to what's the problem and how I can
solve it?