If you got a repack and the Battlegrounds are not working dont panic, all can be fixed with this simple guide.
First open up your Navicat or SQLyog etc (what ever you have)
Go to World, and in there find "worldmap_info"
In there find the battlegrounds you want and change their types to 0.
If still no look always try going on WoWHead and getting the code for the BG mater on there and spawning them.
IF these fail you may want to look around more or just get a new pack.
Thank you for reading
I have not seen this posted before and i know it is a short guide but that is all there is to it, if this is re-post i will delete but not seen it posted anywhere else.