Windows networking problem, validation of server certificates

Hello everyone,

My school has a WiFi network that uses WPA-Enterprise Security and AES encryption; However, for some reason, in the settings PEAP, the box "Validate server certificate" must be unchecked (I have Windows 7). I also uncheck the box 'enable fast reconnect', just because that's what have checked all the mobile school (in XP), although I'm not really sure of what it is. For some reason, however, every time I wake up or start fresh, these two boxes uncheck themselves. Furthermore, I can't find a pattern, first, it will display the properties option when I right click on the name of the network, then it won't appear, then I try to connect and it will not but properties appears once again so I can recheck the boxes, so I have to log in several times. Another thing that confuses me is that it seems that, when demand information identification network appears in the middle of the screen and I connect, it won't work, but when it appears in the lower right corner, there is no. It's the strangest problem I saw, I see no reason for a box of credentials to appear in different places. I thought that everyone guess that, but all laptops to school work without problem. Any suggestions? If the fast reconnection be checked? Thanks for all the help,
T
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