[ubuntu] Cinelerra doesn't show video

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http://ubuntuforums.org – As you read, my cinelerra doesn't show any video I add to it. It doesn't show the clip bars in the video tracks nor show the video either in the viewer or in the composer. The ubuntu I have is 11.10, and the cinelerra version I have now 1:2.2-0-3. Do you have any ideea what's going on? Thanks (Hardware)