[flexcoders] Still very confused with object referencing

[markgoldin_2000]

I have this mxml fragment:
<mx:Canvas label="Consist1" width="100%" height="100%" id="consist1">
<accidents:consistTabSet id="consist1TabSet" creationPolicy="all"/>
</mx:Canvas>
.....

Later on I am trying to do this:
var PersonnelGrid:Object = 
accidentsModule["consist" + consistnumber.toString() 
+ "TabSet.ConsistPersonnel" + consistnumber.toString()];

and I am getting:
Property consist1TabSet.ConsistPersonnel1 not found on 
accidents.accidents and there is no default value.

But in debug window:
accidentsModule.consist1TabSet.ConsistPersonnel1 is shown correctly.
What's wrong in my code?

Thanks