I wonder if any of you can help me.

I recently realized that my set up, consisting of a pair of beolabs 3 connected to a beolab 11 linked to a Quad CDP 99, is not working properly.  What happens is that the sound, although coming from all three speakers, is coming out as if the sound of one channel is coming out of the whole system.  In other words, one channel is working and the other is dead, but the one that is working is coming out of all three speakers. 

In addition to the equipment mentioned above, I have a Wadia 176 itransport (to link an IPOD)  linked to one of the digital inputs of the CDP 99, which in this case is working as a DAC and preamp. 

The problem is the same when I listen to CDs and the IPOD, so I believe I have narrowed it to the cables linking the CDP to the beolab 11, or the setup of the beolab 11, or the cables running from the beolab 11 to the 3s.

Does anyone have any idea as to what is causing the problem?  And how to fix it?

Thanks in advance for any advice you can give me.