Problem skinning a radiobutton

On my site i have some radio buttons that I have skinned by following http://livedocs.adobe.com/flash/mx2004/main_7_2/wwhelp/wwhimpl/common/html/wwhelp.htm?context=Flash_MX_2004&file=00002713.html

Everything works fine, except there is still a hideous bright green halo around the button when you select it. How do you remove that?!?!