Most likely your app is on top of the loading div and thats why you don't see the div. You either have to hide the app while showing the loading div or apply some CSS z-index to your div so it appears on top.
These kind of issues can easily be understood by using the browsers Dev Tools and inspect/modify the HTML. -- J. -- You received this message because you are subscribed to the Google Groups "GWT Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to google-web-toolkit+unsubscr...@googlegroups.com. To post to this group, send email to google-web-toolkit@googlegroups.com. Visit this group at https://groups.google.com/group/google-web-toolkit. For more options, visit https://groups.google.com/d/optout.