Hello, I'm getting the same SDK internal errors as described here. I tried burning compilations that were only an hour long so there was plenty of room. I did try reducing the speed but it did not help. I think I have version 4.3.8.2631, (downloaded from Cnet) so I'm not sure if I should post this elsewhere. I had just Googled "SDK internal error" and found these posts. In addition to that error it also says something about it possibly being bad media, but I've tried two different kinds of CDR's (HP and Sony Audio) and I really don't think that is it. I have a brand new laptop and I've been getting worried that my cd drive might be a lemon so I'm trying to test it out as much as I can to see if it's a software or hardware issue. I also downloaded JetAudio and had some trouble with it initially as well, very similiar in fact, but I tried slowing the speed down and did get a successful burn with JetAudio that way--I will test more to make sure it wasn't a fluke. I'm also going to burn with WMP to see if there's any problems there. I figure if I have issues with all three, it must be the drive, although I'm really hoping it's software related.