Redmine

Hello,
Iam using the Debian squeeze redmine package and everything are working very well, except from the email notification.
Its sending all notification, but i just want to receive notifications "Only for things i watch or i'm involved".

When i go at option "my account" on "email notifications" box, i select "Only for things i watch or i'm involved", but when i press SAVE, the option get back to "For any event on all my projects".

anyone know how to fix this issue ?

very thanks in advanced.