Tunebite taking up too much system memory

[Belmont]

Hi everyone here. I just tried Tunebite. It is a good appl in all aspects to remove drm but it takes up too much system memory. I have a dual core CPU and 2G system memory. But during the conversion, Tunebite takes up all the system memory and in some parts of the converted movie, the audio and video is not synchronized.
i.e.: the audio continues but the image freezes. The frame rate of the video definitely drops in some parts of the converted movie. I assume the reason is that Tunebite takes up too much resource especially the system memory during conversion.
Do you have the same problem with Tunebite? How do you solve the problem? Can you give me any advice? Thanks!