Mining with dd-wrt bridge problem

[Skatebird]

Hey guys, have a little question for you, iam trying to mine scrypt on a knc titan. Ive set my rig on a second routeur (bridge, routeur is not physically in the same piece)). I presently use dd-wrt to build bridge between my 2 routeurs. The problem is, my miner always starts to mine like 2 seconds and stop after that. Ive a feeling that my bridge isnt enough strong to maintain miner... Is it possible ? Do you know how i can improve the power of my bridge with dd-wrt ?