# DOPUS suddenly quit previewing movie files in viewer pane **URL:** \ **Category:** Help & Support\ **Created:** [April 3, 2008, 2:31am UTC](https://resource.dopus.com/t/dopus-suddenly-quit-previewing-movie-files-in-viewer-pane/5796 "2008-04-03T02:31:48Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![vnorthr](https://resource.dopus.com/letter_avatar_proxy/v4/letter/v/d6d6ee/32.png) [@vnorthr](https://resource.dopus.com/u/vnorthr)\ **Post date:** [April 3, 2008, 2:31am UTC](https://resource.dopus.com/t/dopus-suddenly-quit-previewing-movie-files-in-viewer-pane/5796/1 "2008-04-03T02:31:48Z")
help, i'm not sure what happened but everything was working fine and was able to view my videos in dopus with the viewer pane, but today when i tried to do this, i just got a bunch of letters and numbers. what could i have done to make this happen? it does it to all video/movie files. Thanking you in advance for your support. ---
**Author:** ![Leo](https://resource.dopus.com/user_avatar/resource.dopus.com/leo/32/69732_2.png) [@Leo](https://resource.dopus.com/u/Leo)\ **Post date:** [April 3, 2008, 6:43am UTC](https://resource.dopus.com/t/dopus-suddenly-quit-previewing-movie-files-in-viewer-pane/5796/2 "2008-04-03T06:43:15Z")
Do movies play okay in Windows Media Player? It's not exactly the same as Opus but they both rely on the same underlying stuff to play videos so it's a good first test. The first section of this FAQ, which suggests temporarily assigning filetypes to Windows Media Player to repair registry settings, may help: [[HOW TO: Enable/fix playback of various media formats in Opus](http://resource.dopus.com/t/how-to-enable-fix-playback-of-various-media-formats-in-opus/1974/1)) ---
**Author:** ![vnorthr](https://resource.dopus.com/letter_avatar_proxy/v4/letter/v/d6d6ee/32.png) [@vnorthr](https://resource.dopus.com/u/vnorthr)\ **Post date:** [April 3, 2008, 7:02pm UTC](https://resource.dopus.com/t/dopus-suddenly-quit-previewing-movie-files-in-viewer-pane/5796/3 "2008-04-03T19:02:43Z")
Hello, yes they play fine in wmp and i've checked the file associations bu they still won't play or preview in dopus. thank you ---
**Author:** ![Leo](https://resource.dopus.com/user_avatar/resource.dopus.com/leo/32/69732_2.png) [@Leo](https://resource.dopus.com/u/Leo)\ **Post date:** [April 3, 2008, 7:04pm UTC](https://resource.dopus.com/t/dopus-suddenly-quit-previewing-movie-files-in-viewer-pane/5796/4 "2008-04-03T19:04:23Z")
Is the Movie plugin enabled? If you configure it does it list the appropriate file extensions? ---
**Author:** ![vnorthr](https://resource.dopus.com/letter_avatar_proxy/v4/letter/v/d6d6ee/32.png) [@vnorthr](https://resource.dopus.com/u/vnorthr)\ **Post date:** [April 4, 2008, 1:28am UTC](https://resource.dopus.com/t/dopus-suddenly-quit-previewing-movie-files-in-viewer-pane/5796/5 "2008-04-04T01:28:34Z")
i have it enabled.....i don't know what could have changed from one day to the next. i've even uninstalled and reinstalled the program. ---
**Author:** ![Leo](https://resource.dopus.com/user_avatar/resource.dopus.com/leo/32/69732_2.png) [@Leo](https://resource.dopus.com/u/Leo)\ **Post date:** [April 4, 2008, 7:03am UTC](https://resource.dopus.com/t/dopus-suddenly-quit-previewing-movie-files-in-viewer-pane/5796/6 "2008-04-04T07:03:30Z")
My guess is it's your video codecs. It's odd that WMP works fine, though. If you are on 64-bit Windows then that might explain it, as the default WMP is 32-bit and uses 32-bit codecs while Opus is 64-bit and uses 64-bit codecs, which may be different.