You should concentrate on gaining some pure muscle first. If you are already in the single digits, you will have to come up in bodyfat to make any appreciable gains in muscle.
If not, its gonna be a long hard trip.
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Ever heard of "off season?"
This is when the pros eat up everything, work hard, and rest more. Save the cardio and fat burning until you have made some solid gains. Keep testing your bodyfat. Make sure that the bodyfat isnt going up too much while you are gaining muscle. You don't need to get completely out of shape to gain, but to try and drop bodyfat and make gains at the same time is nearly impossible- unless...
Build the muscle, bump up the bodyfat. When you are up where you wanna be, maintain for a while before you lose it all trying to get down to 7%.