Can't burn CD - error 4315

I've tried several times to burn a CD and it keeps giving me the error message number 4315. Sometimes it shows up after the burn process has already started and it checks the playlist but then cancels the burn and shows the error message. Other times it shows the error message as soon as it starts burning. It's really important that i get this fixed ASAP! Please help me! I have the most recent version of Itunes and I haven't had any problems with burning before this.