CD-RW write protected

I got some TDK CD-RW’s that are for “High Speed Burners”. I am using Easy CD 4 by Adaptec and when I try to burn something onto these CD-RW’s I get an error telling me the disk is write protected. I’ve used Memorex CD-RW’s and they work fine. I’malmost positive that my burners writes fast enough to CD-RW’s (I believe its 4x or 8x). Why are the TDK CD’s giving me a write protection error?