Bc2000 (for the BCF2000 & BCR2000)

After spending way too much time searching the web I got my Behringer 
BCF2000 working with Sonar 5 in Mackie Control emulation mode. 

It was working great for a few months and I was very happy with it 
but now has stopped working. Here's what happens: 

When I start Sonar the control surface toobar status window just 
says "Connecting..." (not sure what it said when it was working) 

When I then open an existing or new project the MIDI activity monitor 
in the taskbar begins showing a constant stream of MIDI output 
(sucking up CPU). If I remove the control surface the MIDI output 
stops. 

I can reproduce the issue without the BCF2000 by adding a Mackie 
Control surface pointing to my MPU midi out (with no device out 
there). My guess is that Sonar is sending a "Connecting" command to 
the control surface and waiting for a response. Since it's not 
getting the responce it keeps sending the command, hence the constant 
MIDI output stream. 

If this is the case, why did my BCF2000 stop responding to the 
message? 

I've tried all the typical stuff - rebooting (PC and BCF2000), 
reinstalling drivers, etc. I've upgraded the BCF2k firmware to 1.10. 
I've tried using a MIDI connection instead of USB. No luck. Get the 
same stream out MIDI out from Sonar (the MIDI In light on the BCF 
flashes constantly). I've tried different deviceIDs, USB modes, etc.

Any suggestions? 

Thanks