I can't authorize Waveburner

Hi, I'm having real issues authorising waveburner. I've finished installing Logic Studio on my new Mac Book Pro, Logic is behaving properly, but waveburner's authorisation refuses to "take" every time i start waveburner it seams it wants my serial number and (because i've upgraded through the versions of logic) my xskey (if any of you guys remember that thing.) I put in the serial number, then insert my xskey and waveburner starts and works properly, if i quit and restart the app it works, but as soon as i restart the machine, it asks for the serial again serial number. Thank IK.