CDR media probelm?

[Xeno1101]

Hi, I'm new to this board. Anyways, I was always able to burn self-bootable games for my dreamcast. Recently, I downloaded a few self-bootable cdi's that looked interesting. While in the past I was able to burn and play with no probelm, now I can't. My dreamcast won't read the new burns. It starts to read at the DC start-up screen, and it take quite a while before it takes me to the dreamcast menu. I've tried basically everything, and have now come to the conclusion that I may be using the wrong type of CDR media. I'm using Sony 700meg 80min CDRs. Are there any specific types of CDR media you preferable for burning DC games?