Crap. Somehow my router started to blck internet connection from me. The guy from the company (that I get my internet connection from) came over and said that.
So now, my PC internet is fine, but my router is not connected so I got no connection for my PS3.
I gotta wait a few days till I get someone who knows about this stuff (cause I know nothing and dont want to mess things up more), so no online on PS3 till then.