[away3d] I run the Away broomstick example but ... cant find handle ??

[wen smart_ant]

Description     Resource        Path    Location        Type
1119: Access of possibly undefined property handle through a reference
with static type away3d.loaders:Loader3D.       AnimBlendTest.as        /
AwayBroomStick/src      line 150        Flex Problem


private function onMeshComplete(event : AssetEvent) : void
                {
                        if (event.asset.assetType == AssetType.MESH) {
                                _mesh = _loader.handle as Mesh;