Zombie Survival Map Voting

I’m hosting a Garry’s Mod Zombie Survival server but I am facing one problem…

Players can’t vote for the next map and I get this:

:1: attempt to call global ‘OpenVoteMenu’ (a nil value)

Ok sorry this is probably ment to be in LUA section, dumb ratings are welcome.

Bump.

How do I fix this? I know how to edit a lua file, please just tell me how to.

Oh shit, bumped the wrong place… Really didn’t mean it!

http://www.facepunch.com/showthread.php?t=811599