[ubuntu] Flash not working in ubuntu 12.4

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http://ubuntuforums.org – I have checked the forum to see if I could find out why flash is not working and to see if there was a solution to this problem. I have not found any as of yet. I know flash is installed as I have used flash aid to install it. When I go to youtube and try to view a video I get nothing not even a box where the video will go. I am using firefox and have added the download plug-in to download the video and that works fine but I would like to see them on the web site. I have also tryed chromium and that will not work either. Dose anyone have a guess as to why my flash is not working. (please hel (Hardware)