Why Rich:toolTip not work Under rich:calendar
<p>Why is Rich:toolTip not working under rich:calendar?</p>

<pre><code>&lt;td&gt; 
&lt;rich:calendar id="valuereq" requiredMessage="Requested Date Required" inputClass="inside_text" value="#{projectDetailManageBean.projectDetail.requestDate}"    datePattern="M/dd/yy" required="true"&gt;
&lt;rich:toolTip for="valuereq"&gt;Select Request    Date&lt;/rich:toolTip&gt;
&lt;/rich:calendar&gt; 
&lt;/td&gt;
</code></pre>

<p>This code should display a tooltip on the calendar box, but it didn't show .. why so?</p>
