HELP: error (RT) in showdialog: exception

[JimS]

Every time I try to use the toolbar for any action on this particular machine I get "error (RT) in showdialog: exception" and it stops in: System --> Dialogs --> Dialog Functions --> ShowDialog on the following line: int r=DialogBoxIndirectParam(_hinst dt hwndowner dlgproc d)

The machine is Windows Server 2003 freshly built.