Roku questions

Hi....my son got me a Roku 1 and am trying to set it up. I have a desktop hard wired to Time Warner Cable and a laptop wireless to the same.....the the modem is a cisco and the router is Time Warners Arris......I finally have the Roku on the tv creen but everytime I try to connect it says try again.....I dont know what else to try..........if anyone has a suggestion I would truely appreciate it....am trying to set this up so I can cancel Time Warner for good.