Need Help About A3 Web

[a3gamemaster]

hello friends
i am facing some problem on a3 web management system.
hear is the link of that system
http://forum.ragezone.com/f486/dev-a3-management-system-841882/
and me getting error is "Unable to locate the specified class: Output.php"
me posting 1 image

 

[a3gamemaster]

some re-play me waiting.
-thank you.