Repetier closes when pressing slice button (no replies)

Hi,

Just got repetierHost installed to my new installation of Ubuntu, after some struggle got the host to communicate with the printer.

but now when i try to print my first object repetier closes every time I press the "Slice with slicer" button ((when the extruder heater is on it asks me to turn it off, and when its off it just closes repetierhost...


If anyone could help me with that it would be awesome!
Thanks!