LDAP Based Authentication Through Jscript

I am attempting to authenticate users through JScript (server side) code and Active Directory. In its current behavior the code below throws an empty exception (e.description == "") if the username and password are invalid and if they are valid the exception "Class doesn't support Automation" is thrown. Thank you very much for your advice!

function AuthenticateUser(sUsername, sPassword)
{
   try {
      var ADS_SECURE_AUTHENTICATION = 1;
      var ADS_USE_ENCRYPTION = 2;
      var objLDAP = GetObject("LDAP:");
      if(objLDAP) {
         var sResult = objLDAP.OpenDSObject("LDAP://xxxxxxx.xxxx.xxx/cn=users,dc=xxxxxx,dc=xxxx,dc=xxx", sUsername + "@XXXXXXX", sPassword, ADS_SECURE_AUTHENTICATION || ADS_USE_ENCRYPTION);
      }
   }
   catch (e) {
      log("Exception in AuthenticateUser: " + e.description);
      throw(e);
   }
}

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