can't set round corner

I have a problem with the round corner settings in texttfield. I have this code

onhover="showtext([br]Text[br] text[br],style_lux)"/>

<textstyle name="style_lux"   font="Corbel"   fontsize="15"   bold="false"   italic="false"  borderalpha="5"   background="true"   backgroundcolor="0xFFEFD5"   border="true"   bordercolor="0x32CD32"   textcolor="0x32CD32"   alpha="0.9"   blendmode="normal"   edge="center"   textalign="left"   xoffset="0"   yoffset="-22"     />

I have error: "ERROR: unknown attribute/path - textstyle[style_lux].borderalpha"

When i change "borderalpha" on "roundedge="5" i have error: "ERROR: unknown attribute/path - textstyle[style_lux].roundedge"

How can I set the round corners?

yes, I have the latest version krpano -> "1.0.8.11 (build 2010-05-31)"

I tried also to set "roundedge" of the current hotspot, not in textstyle but to no avail. (?)

Perhaps this is because the hotspot is a file ".swf" and not "textfield.swf" ?