it's very strange becuase it looks like it's driping fuel from the regulator screw.. it's like the fuel flow is blocked and when there is no other place to go it's starting to drip from there , but then after several attempts it started to drip fuel from the carburator..
i disconnected the fuel line that connects the left nipple to the HS needle body and i spin the engine by using starter, and i saw that the fuel is flowing ( although it's wasn't constant but more like in pulses )