iPad iPad 4 WiFi Problem!!!

Hi macrumors,
I have an iPad 4 WiFi only. At school we have WiFi everywhere. All we have to do is to click on the SSID and a web authentication page pops up and you have to enter your creditentials to use the internet. Just recently I have started to get this message "hot post login cannot open the page because the network connect was lost." Well this is odd as I am usually 1.5m away from the router. My iPod touch 4G can connect without a problem and my friends iPad mini can too. What's the problem? I have restored, clicked on reset network settings but still I get the message. I didn't get this message when I had my iPad 3 on 5.1.1 a long time ago. But now that I got the iPad 4 a few weeks ago, it starts showing this message today.

Anyone?

SnowLeopard OSX said:

Have you ever been able to connect to your school's wi-fi on other devices? Like your phone or laptop? Like other people have suggested, I would recommend you first talk with your school's IT specialist and see if there's anything they can do to work around it.

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I can connect my iPod and laptop to the network and the web authentication page will pop up. But not on my iPad. In my school, we don't have a School IT for some reason. It's all controller remotely in the school board office somewhere else.

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Batavian said:

See if this works...

Remove the connection under "Settings", then "Wi-Fi", select the arror next to "Hotpost" or whatever the name of your SSID connection is, then "Forget this Network".

Add the connection again by locating its SSID name (Hotpost, or whatever), select it, enter your password.

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I have done this many times. But still I get the same message. I've also tried resetting the network settings. But I get the same message.

Anyone?