Pro Tools 9 error help needed...

Hi,

This error hangs my sessions repeatedly:



"DAE can't get audio from the drive(s) fast enough. Your drive may be too slow or fragmented or a firewire drive could be having trouble due to the extra firewire bandwidth or cpu load. (-9073)."



I'm using a pc with Windows 7 Home Edition with an Mbox 2 mini. I believe I've set up the computer per Pro Tools requirements. Any help would be greatly appreciated.

Thanks in advance!

GL