I finally got my new Crank Truss system. The problem is that when I try to let the truss down it hangs up and won't come down. I only have this problem with one side. The other side comes down smoothly. Also I have problems with the Truss sliding down the stand pole. I have tried tightening the bolts but it still slides down. I only have 100lbs evenly distributed. Any suggestions that might help would be appreciated.