Macbook pro, OSX Yosemite 10.10.4
Airport utility 6.35
New modem - airplay working fine with old modem.
New modem - won't recognise the airport express - amber light
Plugged 0-wan into laptop
it finds the airport express
click on the airport express through the wifi on the top bar
It sets everything up beautifully, I tell it to join an existing network,
put in the password,
Everything green
BUT, on the airport utility app, it only shows my wifi, with the airport express with the old code number (not the name I've given it) and the one I've installed doesn't hang under the wifi.
If I click on the device name it tries to make it my default wifi, but then while installing gives me an error message.
I've wasted hours on this - it has never been a problem to reinstall after upgrading a modem before! What gives?