Recently I made some Video CD's of my holiday snaps and put them to music. When I try to play these in my DAVS 550 they play for a short while but then start sticking or skiping, sometimes completely locking the DAVS out requiring me to switch it on and off. This also has occured with some music CD's (Purchased not copies). I've tried several different CDR manufacturers and several different burn speeds, but nothing seems to make any difference. Any ideas?