Your selectOneMenu control does not appear to have a "value" attribute.
How is
JSF supposed to know what property to get/set the control's selected value from?
The secret of how to be miserable is to constantly expect things are going to happen the way that they are "supposed" to happen.
You can have faith, which carries the understanding that you may be disappointed. Then there's being a willfully-blind idiot, which virtually guarantees it.