mail portlet - blank page

Im trying to using the mail portlet with liferay 5.2.9(EE version). however, when i click on the number of the unread mail, the portlet returns a blank page.

Have you looked at
http://vaadin.com/wiki/-/wiki/Main/Running%20Vaadin%20Mail%20Portlet%20in%20Liferay%205.2.x
?

Hi,

Yes i have follow the steps. but still couldnt get it right… I have download the latest vaadin mail portlet from vaadin svn.