Sorry, I think the first time I sent you the code, I looked at the wrong form, so I sent you the wrong code. The select list name is "Contact_me_group_State", so you'd want to get the post variable with that, not the "select" post variable. That is why the variable is not set.
In the switch statement, try using this instead:
switch((isset($_POST["Contact_me_group_State"]))?$_POST["Contact_me_group_State"]:"") {
You can take out the testing code I sent you earlier:
die((isset($_POST["select"]))?$_POST["select"]:"not set");