Landscape Mode does not work

[iPhone0001]

I have and iPhone 4 (not jail broken) and upgraded to iOS 4.3.2. Since then the landscape mode does not work in email or any of the apps that worked previously. Is this a gliche in the iOS update and can it be fixed? Any assistance would be appreciated.

Addendum: Problem solved!

 

[ajw2495]

r u sure when u double tap the home button and slide to the left(ipod controls) the lock is unlocked?

 

[alukado]

Maybe you can go to the youtube.com and search whether it have the video on landscape.