rich:modalPanel appearing for some seconds only

[newbie0014]

Hi,

I have used rich:menuItem to display rich:modalpanel. Code of rich:menuItem is as follow:

<rich:menuItem>

    <a4j:commandLink

        value="Add Machine"

        oncomplete="#{rich:component('addMachinePanel')}.show()"

        reRender="addMachinePanel">

   </a4j:commandLink>

</rich:menuItem>

And rich:modalpanel  code is

<rich:modalPanel id="addMachinePanel">

    <a4j:form>

        <a4j:commandButton value="Cancel"

            action="#{adminBean.cleanupMachineToEdit}"

            onclick="#{rich:component('addMachinePanel')}.hide(); return false;" />

    </a4j:form>

</rich:modalPanel>

With above piece of code, rich:modalpanel is appearing for one or two seconds and again disappear.

Please help me to find out the issue.

Thanks