Also, befor you tried burning the cd, did you test the MD5 checksum of the iso you downloaded? It could be a corrupt download..
If you are using windows, download md5 from the link below and issue this command at the command prompt. (Subsatute
directory with the directory where the iso is located and
iso name with the name of the iso.)
CD [directory] MD5 [iso name].iso
You should get a string of letters/numbers (Checksum) from the output. Compare those with the checksum listed on the webpage were you downloaded the iso from. If they are the same, the file downloaded correctly. If they are different, then the download is corrupt. Here is an example of the output of the MD5 Program :
bt3-final.iso f79cbfbcd25147df32f5f6dfa287c2d9
I downloaded this iso from
http://www.remote-exploit.org/backtrack_download.html . If the md5 listed on the web page matches the output of MD5, then it downloaded correctly. (It did.)
Links:
More on MD5-
http://www.fourmilab.ch/md5/
Link to the MD5 program-
http://www.fourmilab.ch/md5/md5.zip
Link to another, graphical md5 program-
http://www.toast442.org/md5/
Link to Backtrack 3 (the iso I used as a test):
http://www.remote-exploit.org/backtrack_download.html