You didn't mention what issues you were having with registration, but I would suggest you contact Cakewalk tech support for that problem.
As far as X2 working with Fruity Loops (which is now called FL Studio), you should be able to ReWire it into SONAR by choosing Insert > ReWire Device > FL Studio from SONAR's main menu. However, if you're running the 64-bit version of SONAR this may not work if FL Studio doesn't support ReWire 64-bit... I'm not sure if it does or not. SONAR X2 _does_ support ReWire 64-bit.
Scott
--
Scott R. Garrigus -
http://garrigus.com - SONAR X2 Power! -
http://garrigus.com/?SonarX2Power * Author of the Cakewalk Sonar and Sony Sound Forge Power book series:
http://garrigus.com/?PowerBooks * Author of the Cakewalk Sonar ProAudioTutor video tutorial series:
http://garrigus.com/?ProAudioTutor * Publisher of the DigiFreq free music technology newsletter:
http://digifreq.com/?DigiFreq * Publisher of the NewTechReview free consumer technology newsletter:
http://newtechreview.com/?NewTechReview