shwanzee

i have had my sherwood reciever since late march. i have had no problems with it and i recomend it to anybody looking for a budget DD, DTS unit. until recently i had no components with optical output. i finally decided to replace my analog cd changer and i bought a RCA 5 disk changer that had optical output. i noticed from the first 3 seconds of the first song that there was no subwoofer usage. i tinkered with it as much as i could but to no avail. i connected the cd-changer through analog connections.. AND THE SUBWOOFER WORKED!!! i switched back to optical.. and once again..NO SUBWOOFER!!! does anybody know what could be causing this problem, and how it can be remedied?? any and all help is greatly appreciated.
Thanks,
Adam

------------------
Let me introduce you properly. This is Enrique. He likes to be called Chim-Chim, but we don't always get what we like... do we?