Wizards popups often close directly on IE
The generated URLs of the wizards in TCE Forms are often longer as 2KB. Thus IE for example trunactes the URL and the selected item which is appended at last is missing for the edit wizard. Because of this the popup windows will close directly.
So the parameters should be send by POST or decreased, eg. the fieldConfig, which could be very long, is not necessary since it can be fetched by tablename and fieldname (which moslty is the case).