Webservice Authentication

Hello All,

I would like to create and use webservices for integration BPM'Online with any external application, so for that i was going with authentication service application in bpm'online academy and I have created the client code in visual studio 2012 using C#. I have provided my own login details of BPM'Online to the authentication service fuction in client code it shows me result as true its right, but when i have passed correct username and wrong password it again showing the same result, can anybody provide a way to do it correctly. It will be helpful for me to move further. And when i hit the "http://123362-demo04.bpmonline.com/ServiceModel/AuthService.svc/Login" url it shows me 

Server Error in '/' Application.

The resource cannot be found.

Description: HTTP 404. The resource you are looking for (or one of its dependencies) could have been removed, had its name changed, or is temporarily unavailable.  Please review the following URL and make sure that it is spelled correctly. 

Requested URL: /ServiceModel/AuthService.svc/Login