Like I said, CTDB is very buggy and is still in development.
You will have to set the game-mode to CTDB and you will have to set a button in the controls menu.
So when you press the selected button, a scouter just like the T.V show will appear half way on your screen to your right.
Look for amber coloured squares on the scouter and at the location of teh amber squares you will find a dragonball.
Once collected all 7 dragonballs like the T.V show, press the Enter/ Use button while standing next to the flashing dragon balls and you should have a menu flash up with some wishes.
Select your selected wish, then repeat this method.
Hope i have helped