OK i change the P9 to P5 and also Z2 to Z1 and now works
i run mesh and i got this
Number of probe points: 109
Probe area: 452.4 cm²
Maximum deviations: -0.633 / 0.027 mm
Mean error: -0.273 mm
RMS error: 0.161 mm
0_1523660226736_Capture.PNG
I m not sure if this is right