I had an issue with a menu disapearing off of the screen when it is run on another PC.
It turns out the dialog was created on a secondary monitor with screen locations. I moved the dialog to the primary montior and selected center and recompiled, which fixed the issue.
If the Center option is being used does the dialog need to be created on the primary monitor?
I am still having this difficulty with another dialog, it works on some PC's and not on others. It dissapears off of the scree into the top left corner. I checked and the Center option is used.