Can not pass contactID to an other State (page)

Question

Hi,
I am trying to pass the contactID from this grid to
contactdetail page load from contact state. It's load fine but did
not select the right record of contactdetail page. Any idea what I
am mssing here?
I do have funtion Edititem in the scripting block as below:
private function EditItem(key:Object):void
var e:SelectionEvent;
if( key == null )
e = new SelectionEvent("addItem", key);
else
e = new SelectionEvent("editItem", key);
this.dispatchEvent(e);
<mx:DataGrid doubleClickEnabled="true"
id="contactsGrid"
doubleClick="Application.application.currentState='Contact';EditItem(this.contactsGrid.se lectedItem.ContactID)"
dataProvider="{contacts}"
editable="false" width="100%" height="100%">
<mx:columns>
<mx:DataGridColumn dataField="ContactID" headerText="ID"
width="30" />
<mx:DataGridColumn dataField="FirstName"
headerText="First Name" />
<mx:DataGridColumn dataField="LastName" headerText="Last
Name" />
<mx:DataGridColumn dataField="Title" headerText="Title"
/>
<mx:DataGridColumn dataField="Type" headerText="Type"
/>
<mx:DataGridColumn dataField="Phone" headerText="Phone"
/>
<mx:DataGridColumn dataField="Ext" headerText="Ext" />
<mx:DataGridColumn dataField="MobilePhone"
headerText="Mobile Phone" />
<mx:DataGridColumn dataField="Email" headerText="Email"
/>
</mx:columns>
</mx:DataGrid>

Answer 1

I have tried a similar way in my application and it worked.
This error may have occured coz ContactId is not getting
populated. Are you able to see the ID column perfectly populated?
. One more debugging technique is to trace the results or put
in alerts for displaying contactID value.This will help you to
figure out wjether the value is getting populated in key or not.
Ex:
private function EditItem(key:Object):void
var e:SelectionEvent;
Alert.show(Key.toString()); //new line
if( key == null )
e = new SelectionEvent("addItem", key);
else
e = new SelectionEvent("editItem", key);
this.dispatchEvent(e);
If this doesnt show any proper output then try to make key as
the type of ContactID (i.e string or Int etc)