Original beige M-Box, resurrected from storage to run with ProTools LE 7.1, with the latest update installed. OS X 10.4.6, on a Dual 2.0 G5. The problem I'm having is that I'm only geting audio output from one channel of the headphone jack -- both the front, and back jack. It's been awhile since I've mixed in ProTools, but I'm 99% sure I've got my I/O configured correctly; yet, I continue to have this problem. Any ideas?