Leaving a network, and then joining back into it?

so i was in my highschool network. then i left on accident.


now.. it won't let me join back into the network because it think's that im not in highschool. people have told me to have someone from the network invite but ihave no idea how to do that.


if i go to networks at the top of the page, click on join a network and search for my school, it doesn't let me join it.


i don't know..


whats..


going on.


but this is very frusterating. i don't understand why it is so complicated.

Leaving a network, and then joining back into it?
if the networks in schools work the same as in England you will need the ICT techs to do it beucase you require stuff like WEP keys ect