Pick and Roll Follow Up, Posting Up

[TigerBball]

Here is what usually happens.

A sets a good legal pick on B. Contact is made by B running into A, but usually without much force, they do not knock my guy down. So B hits the screen, before B even has a chance to make a move around the pick, A will reverse pivot. During the reverse pivot, A will lose contact with B, but then by the end of the reverse pivot, A will regain contact with B with A's backside. Now we are in a block out mode, or post up mode.

The D has switched, so B is now trying to gurad A. B now is trying to get around A in order to establish, position between A and the hoop. However A will move at this point, much like a block out, to keep B on his backside. Then when the pass is thrown. The passer aims for a spot about 5 feet infront of A leading him to the hoop. As the pass is in the air, A will release from the box-out and go receive the pass, hopefully leaving B in the dust.

It seems like all the answers have focused on the pick and not enough on how to roll legally. I still don't feel like I have a good answer. Maybe I am just a thickheaded coach, but my Mom always told me I was smart.