I don't think you have a DRM problem, Wilbur. It sounds like you ripped the CDs to wma, which is a file format that's not compatible with Ipods. If you don't want to re-rip the CDs, you can transcode the wmas to mp3, which will play anywhere. There's plenty of programs that will do this for you, but you should know that there will be some slight quality loss.
In the future, you'll probably want to rip to mp3.