No sound out of MBOX2Pro at PT boot

[Philippe Delanghe]

Hi
I have an MBOX2PRO and a random problem, wondering if I'm the only one. When I start protools, every now and then the green input leds turn off, and I get no sound. The MBOX is synchronized (green led steady) , protool works, but ... no sound. After lots of random tries, I noticed that changing the input clock in protools (trying SPDIF and then going back to internal) or the sampling rate can wake it up; other times i have to turn off, reboot, etc ...
It's clear that at some point during the protools boot some message is sent to the mbox cause I see the green lights turn dark.
I installed the 7.3.1 cs and it still happens. Digi support does not really know what to tell me.
Whoever has had the same issue and know the fix get my eternal gratitude !
Thanks
Philippe