Replaced Window Regulator, still sticking!!

[1968_K20_4x4]

I recently replaced my window regulator (Drivers side) with a new unit from LMC. I also replaced the rubber door glass run and the felt insert on the vent window, all with parts from LMC. However, when I put it all back together my window goes up ok untill about 3/4 of the way up, and then it gets very difficult to crank. I can force it through this tough spot, and then it will finish going the rest of the way up. Same thing to roll it down, it starts out ok, but when it gets about 1/4 of the way down it is very difficult to crank. However once I get over this spot I can finish rolling it down normally. I dont understand why this is happening as its all new parts inside the door, and I did grease up the channels that the regulators wheels run in. Very frustrating as I spent all the time and effort to rebuild my door, just to have it work no better than it did before! Any ideas why this is happening??