Error making chart components selectable in Flex

Hi all,

I’m getting the following error when I make a bubblechart selectable

[COLOR=red]TypeError: Error #1034: Type Coercion failed: cannot convert mx.charts.events::ChartItemEvent@41747c1 to mx.events.IndexChangedEvent.
at flash.events::EventDispatcher/dispatchEventFunction()
at flash.events::EventDispatcher/dispatchEvent()
at mx.core::UIComponent/dispatchEvent()[E:\dev\3.0.x\frameworks\projects\framework\src\mx\core\UIComponent.as:9051]
at mx.charts.chartClasses::ChartBase/http://www.adobe.com/2006/flex/mx/internal::selectItem()[C:\Work\flex\dmv_automation\projects\datavisualisation\src\mx\charts\chartClasses\ChartBase.as:2503]
at mx.charts.chartClasses::ChartBase/processRollEvents()[C:\Work\flex\dmv_automation\projects\datavisualisation\src\mx\charts\chartClasses\ChartBase.as:2277]
at mx.charts.chartClasses::ChartBase/mouseDownHandler()[C:\Work\flex\dmv_automation\projects\datavisualisation\src\mx\charts\chartClasses\ChartBase.as:4248][/COLOR]

[COLOR=black]The only code I changed was[/COLOR]

adding in the following to the <mx:bubbleChart tag
[SIZE=2]selectionMode="[/SIZE][SIZE=2][COLOR=#990000]multiple[/COLOR][/SIZE][SIZE=2]"
[/SIZE]
and making by bubbleseries selectable
[SIZE=2]bs.selectable=[/SIZE][SIZE=2][COLOR=#0033ff]true[/COLOR][/SIZE][SIZE=2];[/SIZE]
[SIZE=2][/SIZE]
[SIZE=2]Anyone have any idea why I’m getting this error!?[/SIZE]
[SIZE=2][/SIZE]
[SIZE=2]Thanks,[/SIZE]
[SIZE=2]Derm
[/SIZE]