Desktop trash icon on Kubuntu

Hi,

I am using Kubuntu 7.10 and trying to get a Trash desktop icon working
and opened with Konqueror.  I have removed the dolphin file manager.
The following desktop entry works in a normal KDE account:

[Desktop Entry]
Type=Link
URL=trash:/
Encoding=UTF-8
Icon=trashcan_full
EmptyIcon=trashcan_empty
Name=Trash

but in desktop entry in a kiosk profile under apps/kdesktop/Desktop I
get the error below.

malformed url trash:/

Any suggestions?

Thanks

Murray