XP cant access Active Directory (System.Runtime.InteropServices.COMException (0x8007203A): The server is not operational at )

I have the problem that I cannot access Active Directory from a Windows XP SP3 machine. The server is a Windows Server 2008 R2. I could access AD from my Windows 7 and other machines, but XP won't work.

I get the Exception...

System.Runtime.InteropServices.COMException (0x8007203A): The server is not operational at System.DirectoryServices.DirectoryEntry.Bind(Boolean throwIfFail) at System.DirectoryServices.DirectoryEntry.Bind() at System.DirectoryServices.DirectoryEntry.get_AdsObject() at System.DirectoryServices.DirectorySearcher.FindAll(Boolean findMoreThanOne) at System.DirectoryServices.DirectorySearcher.FindOne()

I've tried http://www.codeproject.com/KB/IP/StorerActiveDirectory.aspx but even other solutions do not work.

please help me.

regards

denis

Pointing the DNS of TCP/IP v4 to the Active Directory Server solves the problem.