apt-get upgrade
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages have been kept back:
backtrack-web backtrack-wireless...

I had downloaded BT 4 final from xxx.remote-exploit.org/cgi-bin/fileget?version=bt4-prefinal-iso

I burned it, when i open CD i see 2 folder boot,casper and 2 file. But i couldn't boot. Can you...