Gridseed G-Blade 5.2MHs issue

I just bought the Gridseed G-Blade 5.2MHs but i'm not getting it right.

One of them don't mine more than 1.4MHs, see the picture below:

My .bat file is something like this:

Code:

bfgminer -S gridseed:all --scrypt -o stratum+tcp://gridseed.wemineltc.com:3333 -u xxx.x -p x

I'm using the bfgminer version 3.10.0

Thanks.