Error message 4000 when trying to burn a cd in itunes

I am having problems burning a cd in itunes. I am getting the error message the attempt to burn a disc failed. An unknown error occurred (4000). Can someone tell me how I can fix this problem. Please note that I have looked up other ways to solve problem and have tried them and none of them seem to work. Such as in program files I clicked on repair and not uninstall to see if there was any possible corrupt itunes files to be fixed. I changed the burn speed and that did not work. The only thing I did not do was a total uninstall of itunes. I need to know should I do that and if so what site will I need to go on to re-install itunes and will I have to pay for it? My computer which is Windows XP already had itunes on it when I bought it so I do not want to pay for itunes. So can someone please give me some guidance regarding this matter. And please note that I was able to burn cd's in itunes before and then it just stopped working. And I have tested my computer with the windows media player and I was able to burn music from my music library so I know my problem is with itunes.

Thanks!