It could then be some thing with your iOS or with the phone then, but it's weird that you are able to connect on your home wifi and can not run all apps on your school network. Get VPN express from the app store, you will have a trial period with the VPN. Try it and see if VPN solve the issue.
Will do.. but the thing is that all Idevices wont work on this wifi... not my ipad or ipod or any of my frnds apple devices..