Radar chart's tooltip

[Anver]

How can I add tooltip for items of radar chart? I add following block of code

tips:{
       trackMouse: true
       ,width: 400
       ,autoScroll: true
       ,renderer: function(storeItem, item) {
               this.setTitle(storeItem.get('name') + ': ' + String(item.value[1] ) );
       }
}

to chart's series definition, but it does not worked for me.

[Anver]

Sorry, guys. The problem were with

String(item.value[1] )

. Something with item's value access.