The paddingTop and paddingBottom don't seem to work when importing from an external XML source. Is there any reason why?

This is a sample of the code I'm using.

External XML File:

<?xml version="1.0" encoding="utf-8"?>

<TextFlow xmlns="http://ns.adobe.com/textLayout/2008" whiteSpaceCollapse="preserve">

     <div>

          <p>

               <span>To change password perform the following steps:</span>

               <br/><br/>

               <span>1. Click on the eSubmit Plus menu option on the main navigation bar.</span><br/>

               <span>2. Select Preferences from the drop down list as shown in figure 3.</span><br/>

               <span>3. Enter your old password, enter your new password and verify the new password in the text area as seen in figure 4.</span><br/>

               <span>4. Click the Save button to save the new password.</span>

               <br/>

               <img width="494" height="285" source="images/help/account_01.png"/>

               <br/>

               <img width="397" height="269" source="images/help/account_02.png"/>

          </p>

     </div>

</TextFlow>

Other external XML file:

<?xml version="1.0" encoding="utf-8"?>

<TextFlow xmlns="http://ns.adobe.com/textLayout/2008" whiteSpaceCollapse="preserve" fontSize="11">

          <div>

                    <p>To log into the system, please do the following:</p>

                    <p/>

                    <p><img width="510" height="325" source="images/help/login_01.png"/></p>

                    <p/>

                    <p>Once your logon is successful you will be taken to the logon screen.</p>

                    <p/>

                    <p><img width="475" height="293" source="images/help/login_02.png"/></p>

          </div>

</TextFlow>

Flex Code:

init() fires on creationComplete().

[Bindable] private var helpSource:TextFlow;

private function init():void

{

     helpSource = TextFlowUtil.importFromXML(helpIndexSource);

}

<fx:Declarations>

     <fx:XML id="helpIndexSource" source="xml/helpIndex.xml"/>

</fx:Declarations>

<s:RichEditableText id="helpIndexDisplay" x="10" y="10" width="220" height="530" editable="false" textFlow="{helpSource}"/>