MailComposer doesn't work

I tried out to create an email with the mailComposer. The only thing which doesn't work is the attachment. I even tried out the mailComposer in the development documentation. When I create an email, I can see the symbols or 开发者_运维百科the image at the end of the email. But as soon as I save the draft or send the email away, the attachments are empty.

What could it be?

Thanks

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Look at this, it does not seem difficult.

http://howtomakeiphoneapps.com/home/2009/7/14/how-to-make-your-iphone-app-send-email-with-attachments.html