STL files printing stops in line 19

Hello all,
i am a new user and i have build an Mendel. All motors seems to work and i can feed the PLA whem the extruder has 185 degrees. All with no problem. But when i load a STL file, the head is going into start possition, leftfront, and then happens nothing.
I only can see in the software that it seems to stop at line 19.
Please can anyone help?
thanks
Frans

Hi,
Can you attach the g-code, it is easier to spot the error there.

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Prusa with cast PU parts, RAMPS 1.3, Wades extruder, J-Head hot end

; generated by Slic3r 0.7.1 on 2012-12-23 at 18:15:38

; layer_height = 0.4
; perimeters = 3
; solid_layers = 3
; fill_density = 0.4
; nozzle_diameter = 0.5
; filament_diameter = 3
; extrusion_multiplier = 1
; perimeter_speed = 30
; infill_speed = 60
; travel_speed = 130
; extrusion_width_ratio = 0
; scale = 1
; single wall width = 0.53mm

M104 S200 ; set temperature
G28 ; home all axes
M109 S200 ; wait for temperature to be reached
G90 ; use absolute coordinates
G21 ; set units to millimeters
G92 E0 ; reset extrusion distance
M82 ; use absolute distances for extrusion
G1 Z0.400 F7800.000
G1 X85.930 Y86.110
G1 F1800.000 E1.00000
G1 X86.110 Y85.930 F540.000 E1.00749
G1 X86.490 Y85.590 E1.02248
G1 X87.110 Y85.150 E1.04483
G1 X87.330 Y85.020 E1.05235
G1 X87.790 Y84.790 E1.06747
G1 X88.260 Y84.600 E1.08238
G1 X88.750 Y84.450 E1.09745
G1 X89.000 Y84.390 E1.10501
G1 X89.750 Y84.280 E1.12730
G1 X90.260 Y84.260 E1.14231

M109 - its waiting for your hot end to reach temperature. Did you preheat it beforehand? If not you'll just have so wait for it to heat up. There should be a cryptic message appearing in the log showing the temps, and you can watch it increase. Things should start moving when it reaches 200 degrees.

I prefer to heat things up before hitting print. This allows me to do some last second extrusion to make sure the extruder is primed and ready.