D2: LOD Install troubles.

hey, when i try and install Diablo 2: Lord of Destruction, my pc reads the cd fine, and i start installing. It says to put in play disc, i do so, then says to put in LOD disc, after it installs a bit off play disc. I do this also, Then after install for a bit the install gets to D2XTALK.MPQ then asks me to insert the LOD cd, when it is already in. The cd is not scratched heavily, and i have found other people with problems simlilar, others exactly the same. Any help would be greatly appreciated. It is an original cd also. Hamish