Help! Stall Converter fail to work

I've purchased a Stall Converter from Mancini Racing. The description said its a 1200-2500 stall converter for 67-90 A-904 trans. I've installed it and now my car won't even grab any gear. I've check the trans fluids in neutral while the engine is running and its full. I even drop the trans and pull the converter out, to see if it still full of fluid, and it is. I was wondering if someone here can tell me what is wrong, and how can I fix it. I guess I should give you the stats on the car.

Its a 1967 Plymouth Barracuda.
1972 340 motor.
6-pack carb
CAM KIT #P4120231 .484-284 D.C 284-108
1.5 Roller Rocker
A-904 Trans.
Dana 60 With 3:55

Any information would be appreciated.

Thanks,
Larry Gregorio