I burned the iso to a cd, and I insert it into my computer, but it dosn't detect the cd.

I have a version of 3.4 and 3.6 and they both work..

I tried knoppix noscsi hoping that may fix it, but it didn't

When I insert it into my computer, and when it is looking at the hdc (which is the device for the cd rom), I hear it spin up, then down, then up then down..


So my question is, do you think I have a bad burn or something? Any comments. (BTW, I got the iso from the torrent)