Have a look at "ignoreColorSchema" IB_Grid property, it must be False. It it's alredy so, the only thing I can suggest is:
- copy and paste a grid from a form that works, and try it
- copy and paste the not working grid in a form that has other grids that work, and try it
- exchange datasources, just to see if is a datasource problem or a grid one
- if it's a grid one, use "view as text" in the two forms, copy and paste grid code in two notepads windows, and compare side by side the two (the working one and the wrong one) grids properties

regards
Marco Menardi