I try to use this plugin. It is very good idea.
It runs on W2k3 wildfire 3.2.2.
I receive some erros like:
2007.02.27 09:09:04 Client provided invalid session: eb6b731d.
It seems also to have some problems with long usernames (i.e. xxxxx is ok but xxxxxxxxxxx is not ok)
I think due the wrong ip address its not possible to add contacts.
Hope i help