Trying to use Alert.show in module- possible?

Question

I have some user data that I have to validate before
submitting it to a db and so I was planning on popping up an
Alert.show to ask them if they are sure in the usual fashion.
Button click event points to function that should show the Alert.
debug shows that function gets entered, but Alert does not show. no
error, just no Alert. code and controls are in a module that's
loaded into main application based on user input. Is this the
problem? Should I be using a popup window instead of Alert? Thanks
in advance.
Andy C.(never #)

Answer 1

First, thanks for the reply:
I can't browse outside from my windows box( well I can but
they can see what I'm doing), so I can paraphrase.
<mx:Button label="Add Button" id="btnAddUser"
click="doAddUser(event)" />
<mx:Script>
<![CDATA[
import mx.everything and its brother;
private function doAddUser(event:Event):void
var alrtmsg:String="Are you sure you want to add this data
to the database?";
var alrtttl:String="Confirm User Add";
Alert.show(alrtmsg,alrtttl, Alert.YES | Alert.NO, this,
alertClickHandler);
private function alertClickHandler(event:CloseEvent):void
if(event.detail==Alert.YES)
rest of code does validation
]]>
</mx:Script>
This is pretty much straight out of the help screens. Now
this is in a module that's loaded into the main application.
Everything else works as I expect it to, but I can't get the Alert
to popup. And obviously, since I'm validating user input I have to
have a way to show them when they forgot to put something in.
Thanks