After having upgraded to android 4, I am not able to set up my email account.

For security reasons I am requested to encrypt the phone in order to get set up the account. However, I am not able to make the encryption work (security -> encrypt phone). When I start the encryption proces, a screen is shown with the android robot, but nothing happens - even if I leave the phone for many hours...

My phone is Huawei Honor U8860, Android 4.0.3.

Does anybody know how to solve that?