6101 AND 9128 ERRORS

[LUISMI]

Hi all,
I know this thread has been done already, but after triying everything posted here and on the digidesign site I can't ge rid of this error msgs.

So I'll be glad if someone could help me with some new light.j

My specifications:

MACBOOK PRO DUAL CORE 2.4, 4 gRAM, MBOX 2 (connected next to the power supply USB port, External HD Lacie 2 QUADRA (connected to the FW800)
My sessions consist in an average of 10 tracks with plugins like expand, strike, structure rewired .3 auxs sends with reverbs,compresors etc.. and a master track.All needs to be set to 128 H/W buffer for latency accouracy.

I get this errors (6101 and 9128) after 3 or 4 mins after playback, sometimes longer or shorter.

What I've tryed so far:

OSX 10,4,9
10,4,11
10.5.2p
SPOTLIGHT OFF
DASHBOARD OFF
SCREEN SAVER (NEVER)
COMPUTER ,DRIVES AND SCREEN TO SLEEP (NEVER)
NO THIRD PARTY PLUGGIN
SWITCH BETWEEN 1 AND TWO PROCESSORS

After tryed all that I'm still keep getting this error messages.

Please let me know if you know how to solve this problem.any ideas would be very appreciated.

Many thanks

Luismi Valles