Are your option settings correct? Assuming the speakers are connected to the BS you need to switch the BS to option 2 and the BC to option 0 if I am not mistaken.
I think if the Beosystem is in option 1 and the BC 2 is in option 0 which it goes to if no speakers are connected then it behaves like you describe - I leaving the TV/Beosystem in 1 and the BC in 0 which is an invalid combination.
This all assumes your speakers are connected to the BS.
http://www.beoworld.org/beotech/mlsetups.htm
Here is how you change options. I hope I am not too far off, this is new for me but my BV8/BC2 behaved similar when I did the initial setup.
Cheers
JK
BS9000, BS2300, BC2, BL2500, BL3, Bl2, BS1, BV8, BC4, A8