Airport Time Capsule 2TB Setup with IOs : Unexpected Error

Hello everyone,

I encountered the following issue....

I just received a brand new Airport Time Capsule 2TB. Now I am trying to extend the existing WiFi network with it but, when I try to set it up with my IPhone (IOs 8.1.2) I keep receiving a "unexpected error occurred, please try again" message and the App doesn't find/see the Airport at all.....

Bellow the sequence...

Apologies, text in the pictures is in Finnish. The last pic is the one that counts however.

Thanks....