New iPad "unable to join network"
I have a new iPad (3rd gen) running the latest version of ios. I use a iPad, iPhone and MacBook pro at work and regularly connect to a unsecured wireless network with each of them. Or at least I used too!
One day my iPad which had previously connected fine, just stopped connecting. I receive the error message "unable to join xxxxx network". Ever since it has not connected again. The iPhone and MacBook continue to work fine. Other colleagues iPads also connect fine and my iPad connects to every wireless network other than this one.
The network uses Microsoft gateway, which essentially means when you connect to the unsecured network you type in your username and password into a webpage. Although I cannot even get to this stage on my iPad as it refuses point blank to join the network.
I have tried everything suggested in other posts on here. I have tried: forgetting the network, wifi on and off, rebooting, resetting network settings, brightness settings, static ip address like the iPhone when it's connected, hard reset of iPad, restored iPad, restored iPad to completely new and not installed a thing, installed certificates. The only thing I cannot do it restart the router, all other devices connect fine.
My username and password for the network are fine, I spoke to it, they use no mac filtering or blocking, it is completely unblocked. I have been to different places in the building to try and on different routers round the building all of which create a building wide wifi - none work. I am well and truly stumped And have tried everything suggested in previous posts.
I am at this stage assuming it must be a bug in the software and am hoping iOS 6 resolves it. I have no idea why it started doing this but it is really frustrating. I have a wifi only model so it really limits what I can do with my iPad at work, which was lots before it stopped working.
Any help or suggestions would really be appreciated! Thanks.
iPad, iOS 5.1.1