There was a thread a while ago about this. There is something physically different within the PCM 2.0 module IIRC, it might be something to do with MP3 playability etc...which negates the 2.1 update.
In the previous thread I mentioned it went into this problem in quite some detail, but you might be better off talking to an OPC who knows the score.
In the previous thread I mentioned it went into this problem in quite some detail, but you might be better off talking to an OPC who knows the score.