I belive the pacesetter needs white grease on the fulcrum. If you did grease it up correctly, just give it some time to set in. If you still have problems, take the shaft out and make sure it is facing the right way. Your next step would be to look under the car and make sure the bolt holding your bushings in isn't too tight.
One question though, were you in neutral when installing the shifter?
I actually have the same problem, but after a little while it started loosening up on me.