Owner Drawn status panel problem

I have a statusbar with 3 panels, the middle one being owner drawn (the
other 2 type pstext). On my home computer (running windows millenium) I can
without problems draw an icon from an imagelist. When i run my app. on my
works comp. (running win NT - serv. pack 5) another icon (from the first
item in a menu) is displayed instead until the window is minimised and shown
again. I have a similar problem with another form with many glyph buttons
when one is pressed and the others become disabled. On my comp., no problem,
on my work comp., sloooooowww :-/
I have tried adding repaint commands at various points in the program
without success.
Any suggestions greatfully appreciated.