Salut!
A couple of days ago I installed FOP2 V.2.28 (White Lable Full). At first look everything was workin' good enough, and it still works, but.. I've got several problems with some services, such as Action Buttons, Action Submenu.. Let me tell about it by steps:

1) Action Buttons.
The only button which is workin' for now is HangUp. All the others have no reaction on clickin', dunno why, rly.. The permissions are ok (:all), user login is correct (the same as in sip.conf u know). So it is impossible to use any operator funcs if u know what I mean..

2) Action Submenu.
When clickin' a presence icon for any button nothing happens. No submenu u know.

I use asterisk 1.8 (without any freepbx, hate those web GUIs lol xD). My buttons.cfg file looks like this:

[SIP/USER]
type=extension
extension=USER
label=USERname
context=USERcontext
...
and so on.

All the users have :all permissions, so the problem is not about it.

Thans for ur time spendin' on my topic guys.
And thx a lot the author for the great product, gj.
Cheers, kga.