ShowDialog, doesn't finish displaying window??

I have a form that I created for lookup on a database.

On one PC there is a slight delay for the form to show up. You see part of
it, then it finishes displaying and works correctly.

On another PC the form partially displays and you cannot click or move it.
If I select a different window or app and then go back to the showdialog
form, it is updated and displayed properly.

Any ideas on what could be causing this.

I am using the showdialog because I want them to answer the question before
going back to the main form.

thanks

Only thing I can think of is make sure each call to control.suspendlayout has a corresponding control.resumelayout call...???