YodaNet is set to only allow specific wireless cards to access it. If I don’t remember that (as when I get a new laptop with a built in wireless card) I will spend a couple of hours trying to get the PC to join YodaNet. (Again.)

Authorised Wireless PCs

00-30-65-1B-54-1A

00-50-DA-F5-9C-70

00-02-2D-87-F9-4A <– TrueMobile MiniPCI card in Dell c840