Q: Cannot upload to internet site if mastered on Waveburner!

I record for uploading only. I do not cut any Cd's. I find that if I master on Waveburner, I cannot upload to the website CD Baby. I can upload if I do it from the Logic bounce however. The problem lies in the limitations of what can be done in Logic as opposed to Waveburner as far as mastering goes. Am I doing something wrong (I've tried just about everything) or is anyone out there having the same problem? Thanks-Gergdog