o_0 is most likely correct, the school is blocking the website. Many schools have programs that block inappropriate websites that gives them the option of choosing specific sites to block, in which case sometimes the site will simply refuse to load. It is also possible, although not likely, that the traffic from your site pushes the schools server to the limit and so it cannot load. Really there is no way to tell exactly what is happening until you find out what web protect program the school has, or at the very least contact whomever is in charge of the internet protocal for your district. Sorry I can't be more helpful