kk, so i got this phone saturday but it only started working today (got it through BELL and they ****ed up the activation)

anywho i was wondering how to download music from my PC to my 7500, i looked in the manuel but i couldnt find anything... to add, everytime i try and access my 10-4 it says its unavailabe (which pisses me off cause it was a ****ing $300 phone on a 36 month plan!)... i dunno about all this, so i was hoping someone here could help me out! it woulod be much appreciated!!