I have the D2 LOD expansion pack, I burned it on a CD-R becuase I lost the origional disc along with the packaging that came with the CD Key. Key generators won't work because when I use one the game will install but when I try to play the expansion set it says "Please insert Diablo 2 LOD expansion disc" I think the key from the generator migh be to blame. can anyone help me out?

Also can anyone give me an unused Key if possible?