You must ensure that the URL to the Survey in the Closed Confirmation template matches the URL defined in the Global Settings.
For example, if the Global Settings Application Property versaSurveyURL is:
http://yourhost/versaSurvey/view_survey.aspx
The Closed Confirmation Template Survey link is:
http://yourhost/versaSurvey/view_survey.aspx?formid=6&instanceid=1&CS=[CHECKSUM]&sct=1&responseid=[CALLID]