plotter problems

I´m using Intellicad 2000 and calcomp2036 with calcomp 907 driver wich should be thew proper driver. But the plotter draws each line 3 times! Lot of ink in those lines! Has anyone had same problems.And when I print on the smaller laserprinter lines tend to get some kind of random thickness. It´s like Ic 2k does not print in a stable manner compared to AutoCad.