Audio CD Writing Problem !!!!

Hi all..

I am using Nero 7 Premium and had no prob with it..but suddenly i am not able to write audio cd's usin Nero..all other format works like DVD and Data disk..i try to load the mp3's and hit on burn..i get the normal window showing writing started..but the time runs on but the status bar stands stil..doesnt even start..tried lowering the write speed but stil no use..

also tried installin the plugins for nero 7 and now i can see the status bar started wit 2 bar's..then it doesnt move..wat shal i do ???