Chosenbox in listcell with checkmark option is clicked but it cannot show data list.

<zk>
<listbox checkmark="true">
<listitem>
<listcell>
<chosenbox creatable="true" createMessage="Create new message" />
</listcell>
</listitem>
</listbox>
<listbox>
<listitem>
<listcell>
<chosenbox creatable="true" createMessage="Create new message" />
</listcell>
</listitem>
</listbox>
</zk>