cd- burner.

I\'m new at this so please bear with me!!
I have HP cd-writer plus 9100 series (firmwear up to date) and Nero 5.5.5.1 demo.

I can copy music cd\'s (cd-burner as recours and burner) and burn mp3 files with out any problems but when I try to burn other data I always get \"invalid writestate\" and \"could not perform End Track\" and that \"simulation failed at 2x(300 kb/s)\". From what I have been reading the last days on the internet and in the Nero help files is when a error messiges like that the pc dosn\'t have \"enough space to work with\", I have defragmented and run scan disk and cloesed all programs that are running in the background exept the explore and disconected it from the network, so the pc should have all the space (MB)that she needs but that dosn\'t make any diffrence. And yes I have changes the setting in the Nero to make a data cd.

Any sugestions??

Need help!!!