My itunes won't let me see the other half of the screen

I just got my new itouch but I try to register but It only shows me half the screen where it says register later. I can't get to the other side of the screen where it says register now. Please help. I tried everything! Please please help me! Oh I also have a windows XP and my computer is a Dell I'm not sure if thats any help. I've also have had another ipod before but I never had this much trouble. . . I've looked on other forums and they say go to the bottom right of itunes and theres a resize button but I don't have one there. . . I also have the latest version of itunes.

PLEASE PLEASE HELP!!!!

I'd really really appreciate it!

Why do you want to register it as it doesnt have any value. Btw this article has additional information:
http://support.apple.com/kb/TS2024

Hey!
Did you try to re-install itunes? Well i have heard that the Vista compatible itunes don't work with XP. But thats not your case.. Well resizing can help. click on the bottom-right corner where the itunes window ends. You will get a two sided arrow. Drag it and make the windows a bit smaller...! Might help. Make sure that the itunes window is not maximized else it won't resize...! All the best...