Edit: N00bminer if that was you just mining, the rejected shares are likely due to you using stratum, if you'd like you can try again with http
It may have been, MRR appends stratum+tcp to the pool, so I do not think there is a way around it for those little devices. I will check.
i remember there was a a workaround for rented miners, i think it was kinda like a proxy stratum which offers stratum+tcp to the miner
and connects to the pool with http - cant remember which one that was ... at least you where able to set a static diff rather then the one from the p2pool