OK..........cydoor is the main advertising component in Kazaa. Without it Kazaa will NOT work and with it in there you will be plauged by the annoying popups all the time.
AdAware will find and kill it every time and then your kazaa will reload it and you end up going in circles unless you do one of three things.
1 On AdAware do a full system scan and then before you delete any files check the cydor dll and add it to the excluded files list
2 Download and install Kazaalite which is the ad/spyware free version of Kazaa but be aware that some of the features are disabled in Kazaalite
3 download and install the dummy cydoor dll into your Kazaa which will disable the spyware but fool your Kazaa into thinking all is dandy
If you choose the dummy file you will still have to exclude it from your AdAware or it will be deleted everytime you run it.
Grab the dummy from here
http://www.cexx.org/dummies.htm
or kazaalite from here
http://www.kazaalite.tk/