I'm having difficulty with my iPad accessing the internet, receiving email, etc, using the wifi at work. Before the last week, or os, I generally did not have a problem. I don't think anything in our system at work has changed, so I don't know why this problem as begun. Sometimes, it appears that the iPad is connected to the wifi here at work, but I am unable to access internet. I'm not experiening this problem with my home wifi. Any ideas?