When I record a DJ mix into FL Studio it won't let me record more than 30 minutes of audio and when I do it just does not show up in my playlist. I have to record a little bit of the mix, stop, then record a little bit more then stop then cut and past the audio together and so on. Is there a reason for this? Also sometimes when I record audio I get crackles in it and it might skip around a little bit, but sometimes the recording is fine. If anyone could help me out with this it would be very much appriciated.