RPI3 Wireless issue Kodi 6.0.3

Hello everybody !
I’m new in this forum and I’ve got an issue with my RPi3.
I’ve install the image OpenELEC-RPi2.arm-6.0.3 on my SD card for my Raspberry Pi 3.
Kodi works fine when I’ve got a wired connection but when I unplugg the ethernet cable, I’ve got nothing in my wireless connections.
Someone can help me with this issue ?
Many thanks in advance.