Captured video is choppy. Software is VMS 7A, We are new to this software and digital recording. We need to record 1.5- 2.0 hours using a Sony Handycam digital 8 DCR-TRV 460. During capture video preview movement is fine but when we replay the captured video it is choppy or freezing momentarily. We have tried capturing in MS Movie Maker with the same results. All connections, cable lengths have been checked and Defraged HD. We are recieving via USB direct from the camera (USB Streaming). At first the clips captured and played fine. Please Help