[flexcoders] Help with comboBox selectedItem

[funandlearning3]

Hi,

I have a combobox which is populated with query on backend. when I am trying to 
display a alert box with the selectedItem, I get the following error:

Multiple markers at this line:Implicit coercion of a value with static type 
object  to a possibly unrelated type string:

Here is my code snippet

  private function checkAdvisor(event:Event):void{
                
                Alert.show(populateAdvisors.selectedItem);
            }
   
 MXML code:

<mx:FormItem label="Advisor">
<mx:ComboBox id="populateAdvisors" labelField="Advisor" width="150" 
change="checkAdvisor(event)"/>
</mx:FormItem>

Can anyone tell me where the mistake is?

Thanks