spamy

Im at the moment makeing a tekkit server but I ran into a problem with one of the mods. I want the server to be cheat free and economy/factions based without people just geting any block they want from the forge. I need to somehow get rid of the mod "forge" (I dont know if thats the right name but its the thing on the right side of the enventory screen). I want to remove this but i need to with either removeing it or useing perrmisons bukkit some how. thanks for reading and help would be greatly appreciated. thanks!