Importing from Canon Vixia HV40 via firewire to Magix pro 17, camera is connected, plays fwd/back etc.via computer,  but no video/pic on playback screen?  Computer is operating with Windows 7.  All works well on Windows XP, & internet forums have many entries from people with same Windows 7 problem.   Do you know of any solutions for this problem with this Camera & Windows 7