Normally when you have a Swisscom Access, the routers will made an automatic sincronisation with the Swisscom Servers to exchange the default data like: Wifi Key, SSID, etc...
So maybe tyour router had a hanging session... try the reset button.
If it works...try it again with the Customer Area.
Login with your Swisscom-Login Account then follow this way:
INTERNET > HOMENETWORK & INTERNET and at the left side chose "Setting up a DSL Router"
There you can find all the Router Options like the username and password.
(sorry for my english)
calore1984