[amibroker] What's wrong with this script?

[pftrader]

I get the Error Mesage:

Script:   D:\Amibroker\Scripts\URLGet.js
Line:      4
Char"      5
Error:      'WSHshell' is undefined
Code:      800a1391
Source: Microsoft Jscript runtime error




function Download( URL, filename )
{

    if( WSHshell.Run( "D:\AmiBroker\URLGet.exe " + URL + " " + filename, 
0, true ) == 0 ) return true;

    WScript.echo("Download of " + URL + " failed." );

    return false;

}

URL = 
"http://calendar.forex-tsd.com/type.php?csv=1&date=20080605&calendar[]=4";;
filename = "C:\FX-Calendar.csv";
Download ( URL, filename );