Q: iPad connecting to WiFi Network, but not getting internet access

Hi iPad folk

I'm hoping if you can help me. In short, my iPad is connecting to my internet, but not getting me any internet access. When I go to 'settings' and look at the connection 'page', I get this:

Sorry for the picture quality, but I can't upload a screenshot as not able to access the internet on my iPad!

I'm a bit technology stupid, but I have tried all the usual approaches - forgetting a re-connecting to the network, turning off the router and then turning it on again, resetting all my network connections - and am getting no closer to a solution. I have full signal recieved by my iPad, and the internet currently works just fine with our various phones and whatnot; it's just this iPad.

I would very much appreciate your help as it's driving me insane!