Failed authorization. Please log in to iTunes

I installed the latest update of the iPhone and I want to take advantage of applications downloaded from the App Store, but the iPhone refuses to login and password by displaying the error message .

please Help guys ,, what should i do ?

I too have this issue. I can download items to itunes on the PC, then sync to the ipod touch. Everything works fine. However, when I attempt to download from the ipod touch directly (app store), it asks for my pwd(which I key in) then after a few minutes I get the same message.

To remedy this, simply activate your iTunes Store account by following these steps:

• Check the email address used to create your iTunes account
• Launch iTunes
• Click on the iTunes Store, then click "Login".
• Follow the steps asking you to confirm your information.
• If you forgot your password, you can find through the site iforgot.apple.com:

http://iforgot.apple.com/

Try following: clear first your TortoiseSVN authentication data by right-clicking on empty place in Windows Explorer and pick from menu TortoiseSVN -> Settings. Navigate to Saved Data and clear saved Authentication data.

Next checkout your repository again to a new non-exisiting or empty directory. You should be asked for username and password - enter the username which has write access according to your svnserve.conf file.

If that worked OK you can try to commit a new file.