How does PHP call the. NET WebService? 100 Distribute on

How does PHP call the. NET WebService??? 100 Distribute on
How does PHP call the. NET WebService? Please enlighten me, I wrote a part of the program, but always prompt error: Not created instance object, everyone help me to see, where is wrong?
Client PHP Program:
Require ('./require/nusoap/lib/nusoap.php ');
$userinfo =array (' username ' = ' fiekscos ');
$s =new soapclient (' Http://www.yy-sports.com/webservice/memberinfo.asmx?WSDL ');
$s->soap_defencoding = ' UTF-8 ';
$s->decode_utf8 = false;
$result = $s->__soapcall (' validuserloginname ', Array (' userloginname ' = $userinfo));
echo $result;
?>
Server-side. NET WebService Program:
Using System;
Using System.Collections;
Using System.Web;
Using System.Web.Services;
Using System.Web.Services.Protocols;

Using COM. Basic;

///
Summary description of MemberInfo
///
[WebService (Namespace = "http://tempuri.org/")]
[WebServiceBinding (ConformsTo = wsiprofiles.basicprofile1_1)]
To allow the Web service to be called from the script using ASP. NET AJAX, uncomment the downstream.
[System.Web.Script.Services.ScriptService]
public class MemberInfo:System.Web.Services.WebService
{
//
SOAP Authentication Class
///
Public Securityheader CurrentUser
{
get {return _currentuser;}
set {_currentuser = value;}
}
Private Securityheader _currentuser;

Public MemberInfo ()
{

If you are using a design component, uncomment the line
InitializeComponent ();
}

private bool ValidateUser (string user, String pass)
{
Boolean Reval=false;

Edboperator oo = new Edboperator ();
Try
{
String sql = "Select Count ([ID]) from Webservice_user Where [name]= ' {0} ' and pass= ' {1} ' and [Status] = 1";
user = Tools.filtersql (user. Trim ());
pass = Tools.filtersql (pass. Trim ());
sql = String.Format (SQL, user, pass);
Int32 Count = Convert.ToInt32 (oo. Dboperator.execscalar (SQL));
if (Count > 0)
{
ReVal = true;
}
}
Finally
{
Oo. Dispose ();
}

return reVal;
}

///
Returns the series name according to the series code
///
/// Series Code
/// Series name
[WebMethod (Description = "Enter a new user login name to determine if 0 is unregistered, not 0 is registered or error"), SoapHeader ("CurrentUser")]
Public Int32 validuserloginname (String userloginname)
{
if (! ValidateUser (Currentuser.username, Currentuser.userpass)) {throw new Exception ("Error");}

Int32 reVal = 1;

Edboperator oo = new Edboperator ();
Try
{
String SQL;
sql = "Select Count ([ID]) from Yy_user Where [UserName] = '" + userloginname + "'";
ReVal = Convert.ToInt32 (oo. Dboperator.execscalar (SQL));
}
Finally
{
Oo. Dispose ();
}

return reVal;
}

}
Customizing the SOAP Header Class
public class SecurityHeader:System.Web.Services.Protocols.SoapHeader
{
Public String UserName;
Public String Userpass;
}

------Solution--------------------

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