filament stop in few seconds  

filament stop in few seconds

hello, my name is Ely from Brazil, sorry about my english, and i'm almost to desist from my new prusa

I finish to assembly my kit and i have no success, i dont print nothing yet, for the 3º time the filament stop, the first time he load filament for few seconds and stop

i open to see, found the suppoust problem, i buy new tube ptfe and replace, and again, stop! put new one and when i go to print the calibration, the filament stop again in few seconds!

what i doing wrong? the simple "load filament" dont work, the motor make noise and the tube ptfe is obstructed again

the nozzle is 215º when i do this operation, i make the preheat always

now, i go to open again and change again the tube ptfe....

if you see on the picture, make a ball middle of the tube

i think my product come with problems... 😥