Help Me.

I have an ICBM between a Sony TA-P9000ES and a 5 channel amplifier. Unfortunately, I don't get hear (or see using an SPL Meter) bass when running the AVIA bass management calibration for the left surround (LS) speaker. The right surround speaker works as anticipated. I have the pre/pro set for all speakers to large (no bass management). I have the cutoff frequency for the Right/Left Surround speakers set for 120 Hz. All of the other speakers appear to work as I anticpated. I do get freqs above 120 Hz or so out of the left surround.

Does anyone have any suggestions to help me solve this problem? Could I have made a cabling mistake? Is the ICBM broken? Any help would be appreciated.