unknown applet

I have opensuse 11.0 with KDE 4. After updating to KDE 4 a message “This object could not be created” appears on the dektop and panel. It is a unknown applet. It is easy to delete it but it appears at every login. How can I delete it forever?
Thanks in advance for the help.:\

what kde4 are you running 4.04 or 4.1?
if 4.0 upgrade to 4.1 here http://download.opensuse.org/repositories/KDE:/KDE4:/Factory:/Desktop/openSUSE_11.0/KDE4-DEFAULT.ymp
might fix the problem