We are just switching over to ADT2004 (Windows 2000) from ACAD2000 and are having problems plotting to our HP750c and HP1120c plotters. We used ctb plots to this point but can not get the stb plot formats to plot properly. Plots either plot in color or are in grayscale with dithered lines. We have downloaded current drivers and checked plot configuration, but no change. Is there something we are overlooking. Thanks for the help.