Same time capsule, new wifi network but can't connect

hi,

I just moved to a new appartment and have now a new internet provider with a new modem and a new wifi network

I can't manage to have my TC on this wifi network

What I have done so far:

- connected my TC to my laptop via ethernet (it is flashing amber)

- launched Airport from my Desktop (iMac)

I don't see my TC on Airport when it was working perfectly before my move on my old wifi network :-(

Any advice would be welcome as I really don't see what I have missed ... thank you