hooks in external page

[Kungfu]

Possible? I cant seem to get a hook to work in an external page. I included the global file, is there anything else i need to include. I add a hook in vb.
In my external page i put
($customhook = vBulletinHook::fetch_hook('mycustomhook')) ? eval($customhook) : false;

But it always returns false.
I made a plugin on Vbulletin that is active. i tried echo "test hook"; i also tried $testhook = "testing hook"; type of thing. none of those work as it always returns false and wont evaluate.

Is there something im not doing? Thanks.