"anescu" wrote : If I remove the anonymous wrote : immediate="true" part, then I find myself in another problem, the form validation is performed and the page is not sent to the server. Placing immediate=true on a commandButton causes the action to be run during the APPLY_REQUEST_VALUES phase, resulting in the model update not occuring. anonymous wrote : I also tried to use an anonymous wrote : s:link instead, that would have sent me to the same page, but then I lost all the modifications I have already done. s:link doesn't submit the form. anonymous wrote : Is this a known problem with Seam? Or any other solution/workaround. This is really a JSF issue. Try also putting immediate=true on your checkbox, the model should then be updated (for that component only) during APPLY_REQUEST_VALUES. A better solution is to use more than one form (one for your hide/show, another for the data entry), then you don't need to use the immediate hack on the JSF lifecycle. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4053508#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...