No more sound, no more signal... RME FF800 and Sonar

I'm knocked out. This is problem new from today. No such problems before.

It takes about 30 seconds to launch Sonar (8.5.3 or X1 : same). Then if I want to PLAY, another 30 seconds - if I *insist* and claick play again, I am entitled to a wonderful ''program is not responding'' in a shading gray screen... (*if* it is going to start in the first place...), then, nothing plays : no movement in RME Total Mix, no movement in Sonar led, no movement on mixing board (external). If I try to arm a track for recording (gee I would not do it in such a situation...), it also takes forever before it lit red (Read that also on RME forum....) - yeah of course I asked on RME forum. But just in case there's a ''Sonar'' solution to this so I can work...

No I haven't gigged with drugs nor move any equipment last night. No wiring has been plugged or unplugged. When I powered things off yesterday everything was perfect.

I tried to rebboot, shut down everything, and nothing change. I treid to do WIndows system restore (since everything was perfect yesterday...) : changed nothing.

I had read about issues between RME Fireface 800 and Sonar X1, but according to most, these have been solved issues. Yes I have latest everything you may think of (drivers, patches, and o on). I checked my memory over last 3 days with memcheck and found nothing.
 
I am having this problem with both S X1 and S8.5.3.  I am having a SiiG PCIe FW card with TI chipset (the same model recommended by many on forums (RME, AVID...); I habe S8.5 32 and 64 and problem arises on both.  I have S X1 64bit and same problem.

No there' is no power outtage curently ;-)

Thanks,
Rob