ok so you have an inlet to the skimmer, right? it is a long gray tube that is about a ft long or so. well take some 1/2" id tube and stick one end to that tube and the other to the out put of a maxi-jet 600. this will pump water in to the skimmer to get skimmed.
and are you sure that you have the pump (the ocean runner) sucking water from the skimmer and sending it back to it in one loop? if you take a look on www.marinedepot.com
they have a good pic of what it should look like.
they say that you can hook the skimmer to the drain line coming from the over flow but that would be way too much flow and if is not able to suck up water in the inlet tube. you have to pump it in there. you can use any pump that will pump like 100 gph
or so. i just got a maxi-jet 600 and it works great. you do not need a ball valve for it or any thing.
dose this help some?
A 46 gal
bow front (Soft coral) reef tank with a 10 gal
sump. And a 30 gal
and Clam) reef tank hooked up to the sump of the 46 so they share water.