[RESOLVED] How to subscribe to this service?

Hi,
My WCF knowledge are pretty limited (mostly creating services using web binding).
I'm asked to use a web service a client have we will be integrating with, and unsure what is this and how to use it.

The url is in the format of http://www.clientsite.com/avm/webser...properties.asm

I got a few details like UserId, ID_CK, etc

No idea how to "subscribe" to this service (I tried in VS to add a service reference but keep getting a 404 or a 403)