M-box Noise Blast Problem

[make haste]

hello
i have the M-box 1 running PT-7 on a G4 tower i have 2 problems with the M-box first there is a high frequency whine when i use it with pro-tools. it is super quiet but now i hear it all the time and it is driving me crazy it happens also when i use it with ableton live to my second problem is the classic m-box problem loud white noise blast that occurs and almost makes my ears explode it usually stops when i switch the clock sync to ext but low and behold it comes back like two minuits later. this problem is getting worst now anytime i try to even use the m-box it makes a loud distortion when i turn the inputs up or down leaving me without protools sorry for bringing up the same old topic which i am shure has been answered a million times (hopfully it has been fixed)...i tried searching for this topic in the search feild with no results i dont really know what to search for so any help would be greatly appreiacted even if someone just points me in the right direction search wise.....anyways thank you in advance
ryan

[egrove12]

same problem here... have you heard of any fixes yet? I've found that turning down CoreAudio's output volume helps a bit but the noise comes back eventually.
im running
PTLE 7.1.1cs1
Mac Pro 10.4.7
Mbox1