[otrs] Link to reopen a ticket

Hello, I want to give a link in Survey, so that Customer can re-open the ticket. I tried this : :///customer.pl?Action=CustomerTicketZoom&TicketID= but not working. It is giving error : "Message: No Permission! " What to do..? Thanks... Pradumna Maheshwari =====-----=====-----===== Notice: The information contained in this e-mail message and/or attachments to it may contain confidential or privileged information. If you are not the intended recipient, any dissemination, use, review, distribution, printing or copying of the information contained in this e-mail message and/or attachments to it are strictly prohibited. If you have received this communication in error, please notify us by reply e-mail or telephone and immediately and permanently delete the message and any attachments. Thank you