for about one week there is strange noise coming from the clutch gasket.
(and I am not saying about that lovely dry clutch sound

at the beginning, noise appears when the clutch handler was not pressed
(and when I pressed clutch handler - noise dissapeared)
but now it appears quite often.
I took off clutch gasket, and the center "screw" is easly rotating.
(by the "screw" I mean the thing selected in red

http://imageshack.us/photo/my-images/11/clutcht.png/
(its not my clutch, just found a photo)
as far as I rememer it shouldnt rotate?
(it can be easly rotate by hand, and gives that bad noise)
some grease should be enought or should it be replaced?
regards
Greg