Flexysxtruder Mini Problems


I did install my flexysxtruder as the instruction on OHAI, it was working perfectly with the piece of ninja flex that bring the extruder, suddenly it stop extruding filament so i cancel the print, and when i press retract so that i can change the filament to a semi-flex, the white tube (PTFE) went out a littler bit, and i remove the excess of filament that went out of the hobbed bolt, so when i try to put again my new semiflex filament (with the right settings), nothing happened. I contact support, and i am doing what is call a cold pull, where i heat the extruder put the filament inside as far i can and lower the temperature to 100, later i retract manually the filament. The thing is that i have been trying this a lot of time now and nothing happens.