If you're in SoF, it won't work for you anyway.
To my knowledge, only UF and higher will accept the command.
The wiki has some good quest system documentation:
http://www.eqemulator.net/wiki/wikka...a=QuestObjects
http://www.eqemulator.net/wiki/wikka...=QuestTutorial
The functions there aren't always up to date, but you can look at questmgr.cpp, perl_client.cpp, perl_mob.cpp, etc. for an up to date reference for whatever source revision you're running.