I tried downloading the client application from the given url http://www.actionvoip.com After downloading the client, when I am registering, it is not allowing to register the user name. After entering the User Name, Password and other required information, When I am pressing ok button, I am getting the below error message "Sorry, due to an unknown error your registration request was denied". I tired several times, I am getting the same error. I have also look for the contact email id from the web site. But couldn’t found that. Please help in resolving the problem. read full review »