You've probably got the thread in the steering rack boogered just a little and you're going to have to be lined up just right with right amount of pressure to get it started, it may take 20-30 minutes or more to get it going unless it's really damaged. Try turning the fitting in the loosening direction with a little pressure on it until you feel it "click, then try going tightening direction with a little pressure on it. I know what you're going through and it takes time and just the right combination.
Look closely at the threads on the fitting on the hose make sure they are not damaged on the very end, if they are take a fine file and try and smooth them out.