Hi Reenag,
Sorry that you are having trouble getting Debut to work.
Firstly, please note that this is a forum for community members to help each other out. It is not an official support channel although developers do look at it. If you require support you can easily access several options from the Help menu in any of our programs.
Could you please answer to the following questions to help you troubleshoot and fix the problem:
1. From what source are you trying to record the audio?
2. Does it happen all the time?
3. You've sead that it starts well, how long before it silences? Is it always at the same time?
Regards,
Emanuele