An operations error occurred - using (PrincipalContext pc = new PrincipalContext(ContextType.Domain, "MyDomain"))

Hi

I have code that works great in Visual Studio but as soon as I publish to IIS, it gives me an error stating: An operations error occurred.

If I comment out:

UserPrincipal usr = UserPrincipal.FindByIdentity(pc, IdentityType.SamAccountName, LogonParams.UserName);

and all it's related code, it works. But as soon as I do the findbyIdentity it fails. How do I get this to work on the iis server?

using System.DirectoryServices.AccountManagement;

My application pool is Intergrated, my Anonymous Authentication is enabled and windows authentication is disabled. My asp.net and forms authentication is enabled.