Minimising to taskbar problem?

Hi guy's,

I have a large project that has a problem with minimising two of the forms to the taskbar. At first we had icons missing from the task bar from time to time (fixed). Now on the two main forms, when you minimise the window, it minimises and sits on top of the taskbar (in the desktop area) and not in the taskbar as you would expect! This just stumps me as to what is going on.

Is there an API call to force the minimised window into the taskbar as it should be or does anyone have any tricks/explanations of the problem?

Any help would be much appreciated.