I have 14 sequences on my play list. When executing my play list (all sequences set to full screen video), inevitably one or two sequence will just display the thumbnail video. I have a video projector connected to my laptop which rear projects through one of my windows to an outdoor video screen. Full screen video starts following a momentarily thumbnail video, but a sequence or two just stay thumbnail size. I've tried removing the thumbnail sequences, but the problem just show up on another sequence. I'm wondering if something in my laptop might be interrupting the switch from thumbnail to full screen. I've shut down internet access and antivirus scans on the laptop. Any ideas?