I've upgraded to sonicstage 3.0 prior to purchasing the new disks, but the upgrade didn't solve the problem. I got the new disks just a couple of weeks ago. After I confirmed that they worked flawlessly, I wanted to share my solution here (hence, the late reply). BTW, I checked - the new disks work fine with Sonic Stage 2.0 also, but the old ones don't. So, it looks pretty certain that that was the disk issue - some early batch(es) were defective, apparently. A.