[AccessD] Graphs and Tab Control

Hey All
Just a question. I have a graph that gets requeryed when someone selects 
an item from a list box.
If I have the graph on a form it almost instantly updates, if I create 
the same graph and list box on a Tab Control the graph goes blank 
(nothing displayed) for a bit and then the new results are displayed 
(still quick but annoying). Does this have something to do with the 
graphics behind a Tab Control???