Thanks , Actually i have found a solution .So i want to share it with you .The microsoft Dynamic CRM

is using a parameter "CRM_URL =CRM_URL should be set to the URL of Microsoft CRM. This is usually http://<crmserver>/CRMReports/viewer/drillopen.aspx."

and then set the text box action properties to

=IIf(IsNothing(Fields!opportunityid.Value), Nothing, String.Format(System.Globalization.CultureInfo.InvariantCulture, "{0}?ID={1}&LogicalName={2}", Parameters!CRM_URL.Value, Fields!opportunityid.Value, "opportunity"))

The following are the two site from where i got this info...

http://technet.microsoft.com/en-us/library/aa682806.aspx

http://social.microsoft.com/Forums/en/crmdevelopment/thread/809f4786-ea56-414f-bb6e-e960cc8c6f6c