Following my question from yesterday where I couldn't find one particular wifi, this wifi does now appear correctly. But I can't connect to it. I have the right password (it is in my phone, and I use it), but when I click on the network and enter the password, it tries for a moment and then prompts me the password window again, without connecting.

I'm on Ubuntu 12.04 with a HP Mini 5103, with Intel.

Thanks !