mm i do it but nothing happen just appear somethings on the screen about emails, servers username

Edit:
solved , i open a xterminal on the sakya folder and put this on console:

Leafpad QtLockscreen.ini

and finally i can edit the .ini file jeje thanks

as a tip:
to Restart the app just put this on a xterm: QtLockscreen

and for close the app: Killall QtLockscreen

don't need to reboot to see the changes