meez.com is blocked by the administrator. IF you ask politely, he may allow you to access it at some times or some days.
If your request is refused, you must accept that desision. After all, it's a school computer using the school network and the school internet access.
Peoples have proposed using some proxy in the past, but they CAN be blocked quite easily, and using them can realy get you in trouble. Also, if you can't install some needed software to access those, you can't do anything.
Electro, May 2012