Connecting my PS3 to the internet Wireless?

I have connected my Wii, Xbox 360, Nintendo DS, and my PSP to the internet with no problems, the only one I cannot connect is my PS3. I have the 120 gig version. I thought it was my router, but got a new Vizio router and all my other systems work great. My connection signal is 65%. All my consoles are connected wirelessly in the same room, so should not be a problem. The PS3 will connect to the internet once in a while and usually only for 5-10 min., not reliable enough to play games online. I get a DNS server Error 80710102. I think the PS3 should have the best connection especially since its a newer system, and more advance, but it sucks.