Proble with list boxes and update progress control

[AndyASPVB]

Hi I have an update panel that surrounds a wizard control which I use in conjunction with a update progress control. Now my update progress control works perfectly, with my animated gif and div tag that lays over my wizard control when the user goes from step to step. However, there is a problem that I am struggling to solve. A number of my steps use controls like list boxes, and when the update progress control fires, the list control is not laying underneath my div an animated gif no matter how high a make my css z-index on the div. Does anyone have a way of solving this? Thanks