Date prompt using repository variables adds "DATETIME" literal to narrative

We are using repostiory variables to set initial date prompt filter values for our report. When we do that we get the "DATETIME" literal string show up on our report as in TIMESTAMP '2011-08-18 00:00:00&#39 (I am posting the exact literals from the report.
Is there any way to fix this so "TIMESTAMP" does not show?
by the way the following procedure was followed in trying to create this narrative.
http://bischool.wordpress.com/2009/06/17/set-yesterday-or-some-date-value-as-default-in-obiee-dashboard-prompt/
We are doing this in OBIEE 10.1.3.4.1

Double click on the connection pool and got to General tab.
In the excute on the connect field add the following Script.
ALTER SESSION SET NLS_DATE_FORMAT = 'MM/DD/YYYY'.
Thant will solve the problem of time stamp.
I tried this in my recent project and it works. Let me know if you have any issues
Thanks
If it is the only issue coming up in the narrative view then follow Ashish method.
If the date problem persists for prompts and everywhere in the answers follow my method
Edited by: Venkat Krishna on Aug 19, 2011 11:01 AM

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Date prompt using repository variables adds "DATETIME" literal to narrative

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