Ipad not connecting to Internet, but all other devices are

Question

I'm using the original airport express...have a macbook pro and ibook connected to the wireless network and everything works just fine.  Had my ipad 2 connected last night and it was working great.  All of a sudden this morning it started showing a full airport signal but get a "Cannot Open Page...not connected to the internet" message. 
In my ipad settings under my network I'm getting an IP address and Subnet mask but nothing under Router or DNS. 
I have tried resetting ipad, airport, and router.  Have tried renewing lease, and forgetting network. 
I've been searching the internet for hours for other suggestions and can't find anythingt that's working or that I understand.  Any help would be greatly appreciated.  Thanks in advance. 

Answer 1

Look at iOS Troubleshooting Wi-Fi networks and connections  http://support.apple.com/kb/TS1398
iPad: Issues connecting to Wi-Fi networks  http://support.apple.com/kb/ts3304
iOS: Recommended settings for Wi-Fi routers and access points  http://support.apple.com/kb/HT4199
Additional things to try.
Try this first. Turn Off your iPad. Then turn Off (disconnect power cord) the wireless router & then back On. Now boot your iPad. Hopefully it will see the WiFi.
Go to Settings>Wi-Fi and turn Off. Then while at Settings>Wi-Fi, turn back On and chose a Network.
Change the channel on your wireless router (Auto is best). Instructions at http://macintoshhowto.com/advanced/how-to-get-a-good-range-on-your-wireless-netw ork.html
Another thing to try - Go into your router security settings and change from WEP to WPA with AES.
How to Quickly Fix iPad 3 Wi-Fi Reception Problems
http://osxdaily.com/2012/03/21/fix-new-ipad-3-wi-fi-reception-problems/
If none of the above suggestions work, look at this link.
iPad Wi-Fi Problems: Comprehensive List of Fixes
http://appletoolbox.com/2010/04/ipad-wi-fi-problems-comprehensive-list-of-fixes/
Fix iPad Wifi Connection and Signal Issues  http://www.youtube.com/watch?v=uwWtIG5jUxE
Fix Slow WiFi Issue https://discussions.apple.com/thread/2398063?start=60&tstart=0
Unable to Connect After iOS Update - saw this solution on another post.
https://discussions.apple.com/thread/4010130
Note - When troubleshooting wifi connection problems, don't hold your iPad by hand. There have been a few reports that holding the iPad by hand, seems to attenuate the wifi signal.
~~~~~~~~~~~~~~~
If any of the above solutions work, please post back what solved your problem. It will help others with the same problem.
 Cheers, Tom