I have a Linksys E4200 router.
Im sure i've selected WPA2 Personal with a 26 Character password.
Network mode is MIXED.
I can try setting this to N only. (But i think i've already done this and didn't work)
Channel Width is set to Auto (20-40Hz)
Channel is set to Auto
I'll try tonight when i get home.
Kind Regards,
Michiel