Do not know why but I can not do screenshot. I created in folder iGO subfolder - captures and I put this line in my sys.txt.

[debug]
imei="000000000000000"
skip_eula=0
screenshotsavecameraini=0
screenshotfilename="/captures/image_%02d.jpg"
screenshotfilename="/android_linked_root/captures/image_%02d.jpg"
experimental_features=1
;double_pixel_mode=1

Thanks in advance!