Is your graphics card installed?
"NVidia has a fine tool for that purpose. Open Pardus>Programs>System>More>Terminal Program-Super User Mode and enter this command:
nvidia-xconfig --composite --allow-glx-with-composite --add-argb-glx-visuals
Intel users should edit /etc/X11/xorg.conf configuration file by hand:
* Press alt+f2 keys and type kdesu kwrite /etc/X11/xorg.conf to start editing.
* Find the line # Option "Composite" "enable" and remove the # character in front of this line.
* Find section "Device" and add this line under that section: Option "XAANoOffscreenPixmaps" "true"
* Save the file and quit (you may want to save a backup for the old version of this file since that may cause a blank screen when wrongly done) "
Try re-installing Compiz.