Opacity In MDI

Question

I have a splash screen, and after 2sec, I load my main MDI container Form, using a fade in Effect, simply in a timer, increasing the opacity percent of the form till 100, however, as soon as i click on one of the buttons in the toolbox to display a child form, and maximise it, it appears but the screen isn't displayed correctly. However, if one doesn't use the fade in effect. it looks perfect, Please help