my first post so excuse the noobishness if i posted it in the wrong section.
-your standard UK Yale Frontdoor (see pictures at the bottom of the post)-
i can pick it, thats not a prob - have a hand held one that i play about on but i thought i'd try it on my actual door (same kind); lock picked fine, cyl rotated like halfway round (cw) and then stopped - now, this would be where the actual door should click open but it didn't. i put a fair bit of torque on the tensioner but it was going nowhere. i notice when i put the key in it needs a mighty pull to turn it all the way.
is that all the problem is? just more power needed? or am i missing something.
now for the pics.



any help would be great.
thanks,
~Foto