itunes 7.1 please help!

here is my problem it started back in october when i updated my itunes to whatever version the time, when i tried to click at one of my songs it asked me to authorize my computer to play it so when i put in my password i recieved a message saying that it didnt not have enough memory which i thought it was strange because none of the other programs gave me any problems and i play fm2007 which requires alot of memory, so now i updated to itunes 7.1 and when i go to authorize my mac it tells me "unknown error occured (-50) please try againg later" can someone please help me? i havent been able to listen to my song since october. im not that good with computers so please be patient, I have a mac book pro version 10.4.8 every all my softwares are updated. thanks

ChrisG said:

First off, punctuation is your friend. Use it.

Secondly, try deauthorising all the computers which you have activated your iTunes account on and try again.

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I only have one computer authorized.

Eraserhead said:

Can you connect to the internet? error -50 means it can't connect to the Store as far as I remember.

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Yeah i have connection to the internet