sounds like a poppit on the out side is stuck open. Try reseating it.
If the QDs are tight, make sure you have the correct QDs on the right posts.
Grey = gas and black = liquid.
If you had the liquid QD on the post when you pressurized and the QD wasn't attached to a tap then there is nothing to stop the beer.
To pull off the QD, lift the ring around the QD ( to release the stop ) and pull it up.
How do you BBQ an elephant....first you get your elephant....