Having trouble writing server side code

I have installed FMS 3.5 (by download from Adobe's site)

I am trying to develop a simple chat application. It's quite strange that why the following error is producing

main.asc: line 4: SyntaxError: missing ; before statement: var __CONFIG__.isConfigLoaded = false;

The first few lines look like this

==========================================

load( "components.asc" );

var __CONFIG__ = new Object();

var __CONFIG__.isConfigLoaded = false;

==========================================

if I remove the "var" (AS1 style?) then it does not report any error. Can somebody please help me?

Kind Regards

Rakesh