Error -50 on start up and error 1008 cannot login
big problem! When I open iTunes I get an Unkown error occurs (-50) but nothing else happens, I tried to sync my iphone and I was informed I was not authorized on this comp (which i should be) I went to authorize/ log in and am getting, "We could not complete you iTunes Store request. An unkown error occurred (1008) this is when I try to login, authorize or do anything related to my account, Also when I try to create new account I get the same line except with error code 5002, my itunes store works and I can browse, I just cant sign in, I plan on buying an iPad today, dont know how I will sync it if I cant get this figured out! please help!
Mac Pro, Mac OS X (10.6.6)