Unresolved compilation problems with signed APK using Eclipse and AndroidAnnotations

Unresolved compilation problems with signed APK using Eclipse and
AndroidAnnotations

My Android application uses AndroidAnnotations and works fine in debug
mode but when I try to Export the Signed Application package, the wizard
finishes successfully and created the APK but the app crashes as soon as
it starts with a cannot be resolved error:
The activity that is not found is one generated by AndroidAnnotations.
I already tried all the suggested solutions like Project Clean and delete
the gen folder and run the Export wizard again, no luck so far.
09-08 18:23:57.744: E/AndroidRuntime(11547): java.lang.Error: Unresolved
compilation problems:
09-08 18:23:57.744: E/AndroidRuntime(11547): The import
com.oneworld.poller.activity.account.CreateAccountActivity_ cannot be
resolved