TRY shorter leader and try to cast with the leader already out of the guides
SX40's are definitley pretty ordinary on distance, try a chubby much better, or a blade even better again
6lb fireline is pretty stiff and poor for casting light lures, if you must use it try crystal in 2 or 4lb or go to something like sunline super PE and you will see a big difference
how long is you rod? longer is better for distance, i favour rods close to 7'
cheers
bm