SharePoint Web Serivces Access Denied; Only From VS 2010

Question

After not getting much help on the last question, I decided to blow away the VM and re-create it as I already lost a week on this issue. And of course still issues, btu a little different.

I am using WSS on a 2008 server. I removed from the SharePoint admin the blocked asmx page types. I am using the administrator account with password and the domain, which is the IP of the VM machine. Normally I would never recommend using the admin account, but since I am just running a test to connect to SharePoint web services, so be it.

When accessing this site via a webbrowser, no issues whatsoever.

When accessing the web services from the browser using the admin credentials, no problem.

Then when trying to access the web service via Visual Studio I get the windows security dialog;

Followed by a discovery credential for the list;

Followed by another Discovery Credential for access to the error.aspx page, but as you can see, I can see the list of services for lists.asmx;

Followed by yet another Discovery Credential asking for permission to the $metadata and this just continues continually -it will NEVER authenticate via visual studio 2010;

And then, of course, when the code is ran, what do we get - ACCESS DENIED.

Call made; code not listed makes connection.

Make call to service:

And receive the error.

And IIS for SharePoint is set top Windows Authentication and Impersonate. All defaults.

It has now been going on 5 days; does anyone at all have any clue as to what is causing this? I have used this code and technique for years with Windows Server 2003 and WSS 2.0 and / or MOSS 2007 connecting from remote machines and NEVER, I mean NEVER had issues like this.

I would really appreciate any help.

UPDATE

_lists = new Lists
   {  //Proxy = null,
      Credentials = new NetworkCredential(UserName, Password, Domain),
      Url = "http://192.168.56.102/_vti_bin/Lists.asmx",
      UseDefaultCredentials = true <- Setting this to true or false throws access denied.
   }; // Reference the list object.

If you remove the UseDefaultCredentials completely you no longer get access denied.

_lists = new Lists
   {  //Proxy = null,
      Credentials = new NetworkCredential(UserName, Password, Domain),
      Url = "http://192.168.56.102/_vti_bin/Lists.asmx"
   }; // Reference the list object.

But there is still the 30-60 second lag time. Any ideas?

Answer 1

I assume you've checked the following?

1. Run Visual Studio as Administrator
2. VS on the same machine? Check the DisableLoopbackCheck registry property (there's a KB for this at http://support.microsoft.com/kb/896861 )
3. use the machine name in the username field, not the IP address (MACHINE\Administrator)

There are a few other possibilities, but these are the most common I see.

Answer 2

When adding to Visual Studio you should use the URL as - http://yourserver/sites/yoursite/_vti_bin/lists.asmx?wsdl

Answer 3

This question is quite old: It sounds like the famous "Loopback check" error. Try this solution here: http://support.microsoft.com/kb/896861/en