popuppanel closing automatically after an ajax event on inputtext

[jyothi nalam]

Hi,

I have a popup panel with an input text. After entering the input, a backing bean validation method which checks if the entered input is valid and if there is any associated data in the database is called. The problem is after returning from the method, the popup panel is closed whether there is a valid data or not.

<form id="awbForm">
<rich:popupPanel id="addPanel" width="820" height="360" domElementAttachment="form" modal="true">	
<h:inputText value="#{awbManager.selectedAwbNumber}" required="true">
								<a:ajax event="change" render="decNum,awbList,awbForm" listener="#{awbManager.validateAwbNumber}" />
							</h:inputText>
</rich:popupPanel>
</form>

Please advice.

thanks in advance.