[s2] CheckBox issues

Hi, I've just started working on struts 2. I have a table with check boxes in a matrix kind of a view. Here depending on the database values some checkboxes are initially checked and the remaining are unchecked. When I check an unchecked box then I get a 'failed to load remote content

TabbedPanel

I observed that all the tabs in tabbed panel are seen on initial load. It would be great if some one could help me out. heres the code cheers, Vivek. --