Help! My steering quit! (PROBLEM SOLVED)

I just changed the power steering pressure hose on my 1974 Duster 225 auto. Suddenly, there is no low speed power steering boost. Once the engine speeds up, the steering power boost seems to return. The pump is full, there is no air in the system, and the belt is properly adjusted. All I did was to change the pressure hose, and I no longer have low speed boost. Any ideas?
Author: Cruiser