how to burn Diablo 2 backup CD

[Arbyw]

I burned a backup cd successfully, it also can install the game. But when i try to play the game, it says no cd in cd rom, i have original cd, but i don't want to use the cd often, that why i need to burn a backup cd to play the Diablo 2 online. Thanks to reply

I use nero burning to burn
and my cdrw is panasonic 32X8X4X