Audio prblm PLZZZZZ HELP...........

Hello,
everybody i m having acer aspire4710 i had xp installed in my laptop due to virus i remove it and again install a new xp and now when i m trying to playing sound no sound appear i got its sound driver from net and i m also having a driver cd of this laptop.i tried many times to install the audio driver but it doesnt wrk. it shows installation prblm in this audio driver only and show "no media device found". plzzzzzzz help me....................