I figured out what the problem is. The problem was that JSReouruce
Servlet has a url .ibmjsfres/* and siteminder did not allow that. The issue was fixed once we added this as an exception.
Just to give you a backfround, the classes in ibm-faces.jar converts the tag to html tag lib and java script. So the html source code looks like this
<script type="text/JavaScript" language="JavaScript" src="/edcrslftpa/.ibmjsfres/hxclient_v1.js"></script>
<script type="text/JavaScript" language="JavaScript">
So the url ="/edcrslftpa/.ibmjsfres/hxclient_v1.js should be accessable and permitted inorder to display the calender.