Ps3 won't obtain ip address

Ok here is my problem, my ps3 won't obtain the ip address, i went thorough The basics and did easy, then did wirless connection, then etc till it tried connecting to the router, To be clear first i'm a place called budget-inn-suites, they say their wifi is good, i can pick the wifi up on my phone so i know it works... I Also tried doing custom. Then clicking. Wirless and going from there, yet it still won't obtain a IP, the connection is a 100% it says... plz if you know inform me, i wanna play online with my friends but it isn't working.