Splunk 6 Simple xml, navigation menu not visible on dashboard

Hi,

I have created a dashboard with Splunk 6 using simple xml (dashboard works fine). We used to get the navigation menu (defined in default.xml file) for every dashboard, but I am not able to the same in Splunk 6 dashboard. Using IE 8.

Is there any specific things to be added to dashboard or anything else need to be configured to get the same?

Appreciate your help.