i have try to get normal one of net but cant find i had a mod for single player but now want to get bak on bnet cant bcuz i need a copy of norm patch

http://us.blizzard.com/support/article.xml?locale=en_US&articleId=20758

if you installed it with single player only, you will have to reinstall with multiplayer installed as well with all disks + cd keys.

Re install your "Diablo II" client and if that doesn't help you then post your question via the link that I have provided:

http://forums.d2jsp.org/forum.php?f=21

GL.

I think you can find the patch on bnet or blizzard.com

http://us.blizzard.com/support/article.xml?locale=en_US&articleId=20758

Here you go. Scroll down a bit. You will see this (Windows version 1.13c Upgrade Patch (Includes previous fixes)
Under that you will see where to download it. Right side for LoD. Left for classic