Reason 2.0 Mac When I Try To Update My Itouch To Version 2.0, Itunes Says The Store Is Currently Unavailable?

When I try to update my itouch to version 2.0, itunes says the store is currently unavailable? - reason 2.0 mac

Will I have an iPod Touch 8GB not upgrade to 2.0 for the reasons described above. I worked TRYE everything and nothing.
I tryed later, as they say, but without success. Withoout the update I can not awsome many applications on my iPod, please help !?!?!?!?!?!? 1