Problem connecting to Wi-Fi

Hi guys,

a problem with my girlfriend's iPhone 4 (newest iOS 7.0.4)

She can't connect to her home Wi-Fi where she has been connected for over a year. It keeps on loading but doesn't ask for a password, and it just doesn't connect.

Here a screenshot:
Image may be NSFW.
Clik here to view.

Thanks in advance. For more info just contact me.

Grtz, Yves.