[Gridsphere-users] MessageBox problem

[Andrea]

Hi all,

I'm trying to use this code 

<ui:messagebox style="<%= MessageStyle.MSG_SUCCESS %>" value="Waiting for the end of 
rendering"/>

available at this page http://www.gridsphere.org/gridsphere/docs/TagGuide/TagGuide.html#messageboxtag  

but it doesn't work because it generates this exception 
Unable to compile class for JSP An error occurred at line: 150 in the jsp file: /jsp/resources/renderer/RenderingStatus.jsp Generated servlet error: MessageStyle.MSG_SUCCESS cannot be resolved to a type

Why?

Thank you in advance