this solves the problem, now it retracts how it suppose to be.

i use cura slicer, i changed the starting script and the the option to relative extrution and still no change in print. i even change the config file to m82 code, with slicer is beter then cura for duet? i have this problem since i had problems to connect to the duet and i had to reinstal i installed now 2.0(RTOS)beta1+ (2018-04-12b1) version. shall i go back to the stable one.

when i start a print the first part there is no problem, but when it retract it does 10 cm retraction when i asked a retract of 2 mm in the slicer.

after did it do not bring the 10 cm of filament back.

how can i solve this.

mine configuration file:
; generated by RepRapFirmware Configuration Tool on Thu Mar 29 2018 22:31:50 GMT+0200 (CEST)

; General preferences
M111 S0 ; Debug off Pnnn Debug module, Snnn Debug on/off

G21 ; Work in millimetres
G90 ; Send absolute coordinates...
M83 ; ...but relative extruder moves

M555 P1 ; Set firmware compatibility to look like RepRapFirmare

; Network
M550 Pprusa large ; Set machine name
M552 S1 ; Enable network
M587 S"NKP" P"LesSWirE@NkP8" I10.0.0.236 J192.168.1.254 K255.255.255.0 ; Configure access point and IP addresses. You can delete this line once connected
M586 P0 S1 ; Enable HTTP
M586 P1 S0 ; Disable FTP
M586 P2 S0 ; Disable Telnet

; Drives
M569 P0 S1 ; Drive 0 goes forwards X
M569 P1 S1 ; Drive 1 goes forwards Y
M569 P2 S1 ; Drive 2 goes forwards Zleft
M569 P3 S0 ; Drive 3 goes forwards E
M569 P4 S1 ; Drive 2 goes forwards z right

; dual z drive
M584 X0 Y1 Z2:4 ; three Z motors connected to driver outputs 2, 5 and 6
M671 X-15:290 Y15:15 S0.5 ; leadscrews at rear left, front middle and rear right

M350 X16 Y16 Z16 E16 I1 ; Configure microstepping with interpolation
M92 X79 Y79 Z398 E159,5 ; Set steps per mm
M566 X1000 Y1000 Z60 E120 ; Set maximum instantaneous speed changes (mm/min) Maximum jerk speeds mm/minute
M201 X900 Y900 Z100 E3000 ; Set accelerations (mm/s^2)
M203 X4000 Y4000 Z150 E1000 ; Maximum speeds (mm/min)
M906 X1100 Y1100 Z800 E1200 I30 ; Set motor currents (mA) and motor idle factor in per cent
M84 S30 ; Set idle timeout

; Axis Limits
M208 X-33 Y-70 Z0 S1 ; Set axis minima
M208 X292 Y350 Z200 S0 ; Set axis maxima

; Endstops
M574 X1 Y1 S0 ; Set active low endstops

; Z-Probe
M574 Z1 S2 ; Set endstops controlled by probe
M558 P3 H2 F900 T500 ; Set Z probe type to ultrasonic and the dive height + speeds
G31 P900 X40 Y0 Z0 ; Set Z probe trigger value, offset and trigger height
M557 X15:290 Y15:290 S20 ; Define mesh grid

; Heaters
M305 P0 T100000 B4138 C0 R4700 ; Set thermistor + ADC parameters for heater 0
M143 H0 S120 ; Set temperature limit for heater 0 to 120C
M305 P1 T100000 B4138 C0 R4700 ; Set thermistor + ADC parameters for heater 1
M143 H1 S280 ; Set temperature limit for heater 1 to 280C

; Fans
M106 P0 S1 I0 F500 H1 T180 ; Set fan 0 value, PWM signal inversion and frequency. Thermostatic control is turned on
M106 P1 S1 I0 F500 H1 T45 ; Set fan 1 value, PWM signal inversion and frequency. Thermostatic control is turned on
M106 P2 S1 I0 F500 H1 T45 ; Set fan 2 value, PWM signal inversion and frequency. Thermostatic control is turned on

M200 D1.75
; Tools
M563 P0 D0 H1 ; Define tool 0
G10 P0 X0 Y0 Z0 ; Set tool 0 axis offsets
G10 P0 R0 S0 ; Set initial tool 0 active and standby temperatures to 0C

; Automatic saving after power loss is not enabled

; Custom settings are not configured