Zoom ap+4

Question

im trying to get my pc online wirelessly ive bought a wirless zoom modle 4401 ive gone through the settings and made a connection to my router without wires. when i open my network and management window theres a line from my comp to my router and a line from my router to the world in this line theres an x when i click the x it identifies the problem as domain server name problem im not very good with computers and this has been driving me crazy for 6 hours now any help would be very appricated

(sorry cant spell very well).