deletes my recordings

Im in nursing school and I record my lectures. well this thing has deleted a whole bunch of my recordings. It will say its recording and it will show on the playlist, but when i close the program and try to access my recording, it does not show the recording anymore. like the title is there, but it just has a zero, like nothing was recorded. This happened to me last semester, guess i should of stoped using this dumb thing, but kept using and then this happens again!!! hate this thing i am really disappointed, i really needed those lectures!!!!!!

Dianita123 about eXtra Voice Recorder