Sound prob in XP

hello, i have creative 128 vibra n it gives me problem wen i run it on windows xp..its working fine on 98se just wen i install windows xp sp2 den it gives me prob..da prob is dat i cant go on mic if i go der my full system sound goes n i have to restart my pc to get it back.. my driver of da sound card in xp goes to crystal soundfusion cs4281 .. how do i change it to creative back ? i downloaded da latest version of da driver of creative but it says my creative soundcard is not plugged in..:S... wat should i do to get my mic going or how can i fix dis problem?