Apple ID status code error/ wifi: time out

I've been having trouble with logging in when I want to update an app.

When I try to fill in my apple ID it keeps giving me 'Status code error'

Als I can't log in on itunes.

I never had this problem but since just know I can't get logged in anywhere.

Has anybody experienced this problem? and do you know how to fixe it?

I already tried to change te password, and to the obvious things, but nothings

seems to work.

(ps: I have a macbook pro retina)

An other problem I experience is the fact that I can't log on the wifi at my internship place.

I can go on it though my Iphone, and everybody else can get on it.

Except macbook users, they get a time out every time.

Is there a solution to this problem, that doesn't involve getting a new modem or anything else?

I really would be happy to get an answer to either of these 2 question

So thank you already