[jQuery] localScroll Problem

[jQuery] localScroll Problem


im trying to use the localScroll pluginh in many ways :)
but i receive this error when i click
$("#comentar").click(function(){
$.scrollTo( '-=900', 300 );
return false;
});
E.easing[this.options.easing || (E.easing.swing ? "swing" : "linear")]
is not a function
E.easing[this.options.easing || (E.easing.swing ? "swing" : "linear")]
is not a function
E.easing[this.options.easing || (E.easing.swing ? "swing" : "linear")]
is not a function
E.easing[this.options.easing || (E.easing.swing ? "swing" : "linear")]
is not a function
(latest lib for all)