auto trans 225 engine

Hey.. Need your help .. I took the motor and trans out of my 74 Duster. Did Gaskets and Rings on Motor. New filter in trans. It shifted fine before I took it out. Got it at back together, runs ok. Drove it down the street and back, Trans worked fine. Parked it back in my garage and noticed that the trans fluid was low so added some. Now when I start it, it wont shift into any gear. I notice that I filled the tranny up too much with trans fluid so I figure that is why and try to drain some. I disconnect the front tranny line off the radiator to drain some and nothing comes out. I start the car and still nothing comes out of the line. So I take it the fluid is not circulating? what did I do or what should I check? thanks in advance. Ron :)