Echo Web Framework

I am using Firefox 3.013

I try this options

Command command = new BrowserOpenWindowCommand("http://www.google.com","","");
Command command = new BrowserOpenWindowCommand("http://www.google.com",null,null);
Command command = new BrowserOpenWindowCommand("http://www.google.com","New","");

ApplicationInstance.getActive().enqueueCommand( command )

but, don't work for me

anybody can help me?

Thank you.