primefaces datatable p:ajax not working

[wely cery，修改在6 年前。]

hi

i am creating an jsf liferay faces with pramefaces.i create and datatable inside a form and i also add these two tags:
<p:ajax event="rowSelect" update="form" />
<p:ajax event="rowUnselect" update="form" />

but when i try to opem my page on liferay then i get this error:
Cannot find component for expression "form" referenced from "_1_WAR_klippwtcwebportlet100_INSTANCE_CkpKv4qnMcna_:form:wwtitems".

i realy dont know how can i fix this so please help...

[Juan Gonzalez，修改在6 年前。]

Please write in proper forum category (Liferay Faces) and provide code snippets, or even better, a sample portlet to reproduce.

Thanks!