Mani Plugin Admin help.. :'( Plz

[mportman300]

so i guess after fiddling with it i came to this conclusion if i use correct steam id like this
STEAM_0:0:1043660x (x is a number) i get

FCVAR_SERVER_CAN_EXECUTE Doesnt allow it

when i use an incorrect one like this,
STEAM0:0:1043660x (x is a number) i get

Mani Plugin: You are not an admin

soooo I must enable FCVAR or something? i dont get it..