excel Web query with login and password

Hi
I have a website with "site" name, "login" and "password". I am trying to access this web site with all of the above information supplied from excel using the following code.

Sub Login_WebQuery()
Dim MyPost As String
Const MyUrl As String = "http://fioumes.emea.nsn-net.net:7001/login"
Const PostUser As String = "SITE=prepro" 'Change user name here
Const PosPassword As String = "&LOGON_ID=lleo" 'Change password here
    Const PostPassword As String = "&PASSWORD=anna123" 'Change password here
MyPost = PostUser & PosPassword & PostPassword
    
With ActiveSheet.QueryTables.Add(Connection:= _
    "URL;" & MyUrl, Destination:=Cells(1, 1))
    .PostText = MyPost
    .BackgroundQuery = True
    .TablesOnlyFromHTML = True
    .Refresh BackgroundQuery:=False
    .SaveData = True
End With
    
End Sub

It is not working.

This is the data from "View Source" of this website

 
 function setInitialFocus()
            {
                var focusField = PageHelper.getHiddenFieldById( "SITE" );
                if( focusField.value != "" )
                {
                    var loginField = PageHelper.getHiddenFieldById( "LOGON_ID" );
                    if( loginField.value != "" )
                    {
                        var passwordField = PageHelper.getHiddenFieldById( "PASSWORD" );
                        if( passwordField.value == "" )
                            focusField = passwordField;
                    }
                    else
                        focusField = loginField;
                }
                focusField.focus();
            }
 
            function setTimezoneOffset()
            {
                var date = new Date();
                var timezoneOffset = date.getTimezoneOffset() * -1;
                PageHelper.addHiddenFormField( "MAIN", "TIMEZONE_OFFSET", timezoneOffset );
            }
            
            function forgeCredentials() {
                document.getElementById("forgedUsername").value = 
                    document.getElementById("SITE").value 
                    + "/" + document.getElementById("LOGON_ID").value;
                // alert(document.getElementById("forgedUsername").value);
                
                document.getElementById("forgedPassword").value =
                    document.getElementById("PASSWORD").value;
                // alert(document.getElementById("forgedPassword").value);
            }
 
            function checkPODFrame() {
                //This method is used to prevent from showing login screen in subframe of the POD,
                //it should fill the whole POD window.
                if (parent.PodMain != undefined) {
                    parent.location.reload();
                }
            }
            
            function doAppContainerLogon() {
            	if ("/login"=="/j_security_check"
						|| "/login"=="/") {
            		// Manual validation of user passed, so container login module should succeed
            		// So, submit credentials.
					document.forms[0].submit();
            	}
            }
 
        </script>
    
</head>

Appreciate yur help.