o2 router issues

[AngryApples]

Had my o2 broadband for a few months now without issue

Full mixed mode WPA2 encryption

Now today, out of the blue, its playing up where the laptop will connect wirelessly, but wont hold the internet connection (despite the "internet" light being on at all times)

Keep getting a "i.p address conflict" message - again, havent seen this before and only have my laptop, desktop and iphone connected without an issue

Have tried renewing the leased i.p on all, to no avail

Any ideas folks?

Also, cant even seem able to connect to the touter via wired - does anyone have the new "Wireless Box III" (though I think this is just a "N" version of the old II box)