Can't get Battle.Net to work

Can someone please help me with this? This is what i do to try to get on to Battle.Net. I go to multiplayer, then i click on Battle.Net and click ok. It then says that there is a new version available to download, so I download it. When it finishes downloading and installing, it restarts the game and then i go into Battle.Net again and it just says error or something like that! Can someone help me please?

 

I don't recognize your problem, but you might want to try a manual install instead of in-game patching.

Version 1.15.2

 

Thanks. I'll try it. I really hope it works because my friend has the same version as me and can still go on Battle.Net! His Version is 1.15.0 as well...

 

I'm running the up to date version and no issues. Hopefully you can reinstall manually and get it workin'.

 

Because your CD Key isn't valid due to the fact its a 'pirated' game which you have.
If you've been on battle.net before with the same files then its either out dated or something is corrupt.

 

reinstalling is probably the best solution.