3 link w/ panhard problem

I have my 3 link setup done with the hydraulic cylinders mounted cantilever on the lower link bars. It gets a lot of lift and everything functions great except the panhard bar.....as soon as i lift the truck so far up the frame wants to move to the side. what is the best solution for this problem. does the panhard need to be longer? it is already about 3 ft. long. Any suggestions would be helpful....Thanks!