Yahoo! Maps prevent module from loading!?

Question

Hi All,
I'm trying to implement a map control in Flex 4, and thought Yahoo! Maps would be a good place to start (please do suggest a better alternative, if you know one).
I have my map control in a module. The module load fine without the Yahoo map being declared, however, when I add the map variable it doesn't load. Here is the code:
<?xml version="1.0" encoding="utf-8"?>
<mx:Module
     xmlns:fx="http://ns.adobe.com/mxml/2009"
     xmlns:s="library://ns.adobe.com/flex/spark"
     xmlns:mx="library://ns.adobe.com/flex/mx" layout="absolute"
     width="100%" height="600" cornerRadius="10"
>
     <mx:states>
     </mx:states>
     <fx:Declarations>
     </fx:Declarations>
     <fx:Script>
          <![CDATA[
               import com.yahoo.maps.api.YahooMap;
               import mx.events.FlexEvent;
               private var map:YahooMap; //comment this line out, and the module loads fine
/*               private var mapId:String = "xxxxxx";
               private function mdl_jobs_creationCompleteHandler(event:FlexEvent):void
                    this.map = new YahooMap();
                    this.map.init(this.mapId, 100, 100);
                    this.ui_container.addChild(map);
          ]]>
     </fx:Script>
     <s:Label text="test" />
     <s:BorderContainer id="ui_container" width="100%" height="100%">
     </s:BorderContainer>
</mx:Module>
Any suggestions?
Thanks!

Answer 1

Here's something that may prove useful to helping solve this problem:
I downloaded the source for ModestMaps and used it instead of the pre-compiled SWF file, and it worked! This tells me there is something amiss with the way SWF are treated in my project (I added them to the libs folder in my project).
Any ideas on what needs to be done to fix that?
Thanks!