i really need some help on this..my trimmer engine works and the metal pole spins around when the trigger is pulled....but when i put the cutters on the pole the blades wont move...i've greased them and loosened the nuts on the blade but still nothing..i even put a new chainsaw pole onto the machine to see if that works,but still nothing...i know someone will sort it out for me on here as i've never been let down before..many thanks..any help appreciated..matt