orion cobalt 800.1 amp problems?

I have this amp all hooked up. the remote gain control is not working at all and the amp is producing very little power...i have it hooked up to a 500w orion xlt. i checked all the connections and everything is fine. Is the amp bad? any other ideas?
i have the gain on the amp turned all the way up
 
make sure the gain on the amp is turned up all of the way. the remote gain works off of the main gain so when the remote gain is up all the way it's the same as where the original gain is set at.
 
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