Q: ios 9 is not working with apple watch,

Hi

Try force restarting both devices:

- Force restart iPhone: press and hold both the Sleep/Wake and Home button for at least 10 seconds, until you see the Apple logo.

- Force restart Apple Watch: press and hold both the side button and Digital Crown for around 10 seconds, until you see the Apple logo.

Reset the network settings on your iPhone (you will need to re-establish your Wi-Fi connection again afterwards, so have your password ready):

- Settings > General > Reset > Reset Network Settings.

Then restart both your iPhone and Apple Watch:

- To restart your watch: Press and hold the side button until you see the Power Off slider; Drag the slider to turn off completely; Afterwards, press and hold the side button until you see the Apple logo.

Please try what I have suggested (it involves more than just Wi-Fi).