What kind of PSU are you using?  Are you using all 4 PCIe cables to power it up as well?  Is this a new(used) unit to you or did this just start happening?

Also, do you have pools defined on MRR?  You need to have a pool defined in the webui there otherwise your miner won't hash through them.  I don't know if it would fail over to your third pool, kano.is, because I haven't tried that.