Needing help for wireless for my ps3?

I'm in my college dorm, and unfortunately I have to share the wireless router with many other people living on campus. At first everything was working great and I didn't even have any lagging problems. But then I started getting all these media serves with people's names I don't even know. I would... show more I'm in my college dorm, and unfortunately I have to share the wireless router with many other people living on campus. At first everything was working great and I didn't even have any lagging problems. But then I started getting all these media serves with people's names I don't even know. I would then start getting an error saying "Too many media serves, some media servers won't be displayed" and I also got the dlna error, I believe it is error 7531. Now I automatically get signed out of psn. Is there a way to delete all these unnecessary media servers? They are all located under the photo, music, and video icons.
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