Error: Another mother is already running. Bail out

Each time I start to mine, it will mine for a couple of hours and then it locksup. I have to do a cold start up. In the log file of bamt there is the error: Another mother is already running. Bail out. I already have the voltage increased from 1.09 to 1.113. This also didn't help, after this I lowered the gpu engine to 1050 and memclock to 1150. I tried a lot of other configurations but nothing helps, with this graphic card I should be able to underclock further if i read what other people can reach with the same setup. I am using bamt and also configured static IP via the router. My graphic cards are sapphire 7950 3gb with boost. I changed the BIOS of the graphic card with atiflash so i can lower the voltage.
My motherboard is a asrock 970 extreme4 and i use two of the same graphic cards. When i search for the error on google I can't find a good answer.

I really hope someone can help because it is really annoying.

Edit: It happens after an hour or two