Checkbox position in a list through an itemrenderer

Question

Hi all,
I did make some search and couldn't find anything helpful but please don't hesitate to send me somewhere else if this topic has already been discussed.
Ok,
I created a list and an itemRenderer. it contains a checkbox and everything goes fine except for two things :
Position : I can't success in aligning or centering teh checkbox regarding to the list row.
Label: I can't set any even with dummy text.
How can I get the checkbox well aligned ?
cb.mxml
<?xml version="1.0" encoding="utf-8"?>
<mx:HBox xmlns:mx="http://www.adobe.com/2006/mxml" width="100" height="20">
    <mx:CheckBox label="a" fontSize="9" />
</mx:HBox>
main.mxml
<mx:TileList columnCount="1" width="100" height="20" dataProvider="{pdfPresetsNameArrayCollection}" itemRenderer="cb" rowHeight="30" dragMoveEnabled="true" dragEnabled="true" dropEnabled="true" dragDrop="handleReorder(event)"  ></mx:TileList>
Here is what I get as a result :
I would like to get the checkbox nicely centered but any of the properties I try to set from x/y to verticalCenter is helpless.
Thanks in advance for any inputs.
Loic

Answer 1

Hi and thx for your answer,
I did try this one without success. In fact a friend of mine tried on his won with my file and checkboxes are well placed. As for its swf file, when I launch it on my computer, checkboxes do appear fine.
But when I do on my own and compile, it keeps on displaying checkboxes uncorrectly.
Don't know whatr's wrong :S
Thx anyway,
Loic