[flexcoders] Having trouble with XMLList

[jeremy.carter_mg]

I am calling a webservice with Flex3.0, the result format is 
specified as e4x.

the event.result shows up as a XMLList when I try and debugg the app.
Beyond this I am having a hell of a time parsing this thing. Anyone 
have some insite?

How would I set the dataprovider to these results for a combobox and 
have the labelField = "MGGenre.Name" and the value = "MGGenre.GenreID"

Iv'e tried:
//In my script block
var comboProvider:XMLList = incomingXML..MGGenre;
 
//In MXML
<mx:ComboBox id="genreBox" dataProvider="{comboProvider}" 
labelField="Name"/>
 
//Then to use the selected value
value = XML(genreBox.selectedItem).GenreID;

But I get the error:
"1120: Access of undefined property comboProvider"

I can't figure out what I'm doing wrong, please help...
Here is a sample of my data:
<GetAudioGenresResponse 
xmlns="http://MyWebSite.com/Webservices/Serrano2"; 
xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/"; 
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"; 
xmlns:xsd="http://www.w3.org/2001/XMLSchema";>
  <GetAudioGenresResult>
    <MGGenre>
      <GenreID>7</GenreID>
      <Name>BLUES</Name>
      <Preferred>true</Preferred>
      <Styles>
        <MGStyle>
          <GenreID>7</GenreID>
          <Name>ACOUSTIC BLUES</Name>
          <Preferred>true</Preferred>
          <StyleID>120</StyleID>
        </MGStyle>
        <MGStyle>
          <GenreID>7</GenreID>
          <Name>BRITISH BLUES</Name>
          <Preferred>true</Preferred>
          <StyleID>121</StyleID>
        </MGStyle>
      </Styles>
    </MGGenre>
    <MGGenre>
      <GenreID>12</GenreID>
      <Name>CHILDREN'S</Name>
      <Preferred>true</Preferred>
      <Styles>
        <MGStyle>
          <GenreID>12</GenreID>
          <Name>CHILDREN'S FOLK</Name>
          <Preferred>true</Preferred>
          <StyleID>202</StyleID>
        </MGStyle>
        <MGStyle>
          <GenreID>12</GenreID>
          <Name>EDUCATIONAL</Name>
          <Preferred>true</Preferred>
          <StyleID>203</StyleID>
        </MGStyle>
        <MGStyle>
          <GenreID>12</GenreID>
          <Name>FAIRY TALES</Name>
          <Preferred>true</Preferred>
          <StyleID>204</StyleID>
        </MGStyle>
      </Styles>
    </MGGenre>
  </GetAudioGenresResult>
  <ResultCode>Success</ResultCode>
</GetAudioGenresResponse>