how can a plugin generate an error even when it is disabled?

[actolearn]

okay, i realized there was one plugin associated with the product that i hadn't previously deactivated; i since have. however, now i am getting a different error:

Fatal error: Class 'vBAdvertise_Plugins' not found in /home/informed/public_html/global.php(355) : eval()'d code on line 1

vbadvertise is totally disabled, but it still seems to be looking for it. Line 355 of global.php is

($hook = vBulletinHook::fetch_hook('cache_templates')) ? eval($hook) : false;

so is there anyway i can remove vbadvertise from cache_templates?