Did anything happen when you blew in the air line? Like big bubbles in the skimmer, or still nothing? How much water is it sitting in, I'm assuming it is like 6-10" of water in the blue bucket. Something is blocking/restricting the air intake line anywhere from the venturi to the end of the air silencer, anything happen if you unplug the air silencer? Or, the impeller is spinning the wrong way, put the needle wheel impeller back in and see what happens. Good luck, I hope you can get it going. Can you call MarineSolutions about it, there might be something I am overlooking, it can really be only a couple of things making it do this, IMO.
Matt
Matt