Now my steering has become stiff too!

So I tried to grease the kingpins..... On one side it works fine and the grease came out the bottom, but on the other side the kingpin refused to take any grease, it just shot back out at the nipple.
So then I unscrewed the nipple completely, threw it away, and fitted a brand new one. Same problem, it just refused the grease.
The steering is still stiff so what shall I do now?
