I am trying to add a background color to text that I have added to an image.

When just adding a background color to an image that just contains text it works as described in the manual. But when I try to add a background color to text on my image nothing happens.

At this moment I use the following url:
http://localhost/imageGen.ashx?image=/media/16782/dina.png&class=myBanner&text=<bannerheader>My header</bannerheader><br/><bannerbody>my body</bannerbody>

I use the following classes in the ImageGen.config

   <Class Name="default" OverridesQueryString="true">
      <Constrain>true</Constrain>
       <Compression>100</Compression>
        <ImageBaseDir>http://localhost</ImageBaseDir>;
 </Class>  
        <Class name="banner">
     <InheritFromClass>default</InheritFromClass>
      <Valign>Top</Valign>
  </Class>
    <Class name="smallBanner" OverridesQueryString="true">
      <InheritFromClass>banner</InheritFromClass>
       <Width>50</Width>
 </Class>
    <Class name="myBanner" OverridesQueryString="true">
     <InheritFromClass>banner</InheritFromClass>
       <Width>239</Width>
        <Height>268</Height>
  </Class>
    <Class name="bannerText" OverridesQueryString="true">
       <Font>Arial</Font>
        <BgColor>FFFFFF</BgColor>
     <AntiAlias>True</AntiAlias>
       <Transparent>False</Transparent>
  </Class>
    <Class name="bannerHeader" OverridesQueryString="true">
     <InheritFromClass>bannertext</InheritFromClass>
       <FontSize>20</FontSize>
   </Class>
    <Class name="bannerBody" OverridesQueryString="true">
       <InheritFromClass>bannertext</InheritFromClass>
       <FontSize>14</FontSize>
   </Class>

Any help is welcome.