Cannot batch plot sheet sets

[PeterH]

Using AutoCAD 2005.
In sheet sets I have an override page set-up that should print all
selected drawings to say printer A.
Each drawing is actually set-up (in page set-up) to print to printer B.
When I use the override, only the first selected drawing gets sent to
printer A and the rest to printer B.
What is the correct method/process to be able to select a number of
drawings in a sheet set to print to different printers?
Have wasted a lot of paper and time trying to solve this.
regards
PeterH