iphone 4s on ios 6

i cant access my schools wifi with my phone. i updated to the new ios 6 and now it doesnt let me! i really need it when im in school that is how i get into my emails. it takes me to your home pages saying it cant access the page in which i use to log in i tried reseting the phone, turning off the block pop ups java script and redid everything and i still cant get anything! i need this!!! ASAP! ios 6 is getting me mad!!!! >_<!!!!