Seems to me that your installation of Compiz is not complete.
Use Sulfur and search and install all the packages that have "Compiz" in the name, and also ccsm, simple-ccsm, fusion-icon, sexy-python, emerald and also the package that have support for KDE (i dont remenber the name, bu it haves the string KDE in the name)
also, in the Compiz configurator (cccsm) mark the boxes KDE compatibility and Dbus.
If you want to use Compiz with KDE, not install GNOME3 packages, GNOME3 is not fully Compiz compatible.
ALBERTO FEDERMAN NETO
Favorite Distros: Sabayon, Gentoo, Mageia and OpenSUSE