hi everyone !!! i am quite new to this forum but i hope that some one will have a solution to my problem.

i recently bought 2 of Alang floor lamps and the instruction manual says (or rather indicates) that the height of the lamp can be adjusted ...i tried my best reducing the height by pulling out the knob given with it but it just doesn't seem to happen !!! if someone has the same kind of floor lamp and has adjusted the height of it ( as in reduced it to a smaller height) , can u help me out !!!
thnx