Printer doesn't start printing

[SoundGuy]

I just got an M3D on a loan from a friend.
It prints ok-ish from it's windows client.

Now, I Downloaded Octopi and added the M33-fio plugin.
It connect to the printer and all, i can manually control it (turn the heater up, and extrude some filament) but when i try to print, the temprature goes up to the requested one which is 210 (or 215 ) and doesn't start to print even though it reached that temprature, everythign is stuck and i need to manually shut down the printer and reconnect.
I tried using the iMe firmware at first, and also the M3d one (that the windows version of the officla software installed afterwards)

how do i debug this?