Can't set style properties?

I am failing at changing style properties, except for background. I have included my code sample. Any help is appreciated. My goal was to make it look like the panel was pressed...then I got caught up in trying to change any style properties.

<wire>


   <datasources>   


   </datasources> 



   <styles>


     <style name="btn-style" borderwidth="2" bordercolor="ffffcc" shadowradius="5" shadowopacity=".5" shadowyoffset="5" background="ffff66" width="90%" height="80%" align="center" valign="center" cornerradius="20"></style>


     <style name="btn-style-down" borderwidth="10" bordercolor="000000" shadowradius="0" shadowopacity="0" shadowyoffset="0" background="aabbcc" width="45%" height="45%" align="left" valign="center" cornerradius="20"></style>


   </styles>



   <classes>


    </classes>



    <main>


       <panel name="styleChange" alias="STYLECHANGE" style="btn-style" onclickup="chg-style">


         <text name="callus"  text="Style Change" width="90%" height="90%" align="center" valign="center" alignment="center" size="18" font="helvetica">


         </text>


       </panel>


    </main>



    <actions>   


      <action name="chg-style">


        <assign property="object:STYLECHANGE.background" value="aabbcc" />


        <assign property="object:STYLECHANGE.cornerradius" value="5" />


        <assign property="object:STYLECHANGE.shadowyoffset" value="0" />


        <assign property="object:STYLECHANGE.shadowopacity" value="0" />


        <assign property="object:STYLECHANGE.shadowradius" value="0" />


        <assign property="object:STYLECHANGE.borderwidth" value="10" />


        <assign property="object:STYLECHANGE.bordercolor" value="000000" />


        <assign property="object:STYLECHANGE.width" value="45%" />


        <assign property="object:STYLECHANGE.height" value="45%" />


        <assign property="object:STYLECHANGE.style" value="btn-style-down" />


      </action>      


    </actions>


</wire>

I saw that height is read-only. I am wondering if the others are as well. I couldn't get to the panel wire definition. It said the page didn't exist...so I thought I would post the question :)