If you have been looking on Google for the solution, probably you’ve read every single post on that forum: http://static.flowplayer.org/forum/1/29205 and still didn’t get the answer. There are some good ideas, but most of them a little complex for simple solution. So what we ended up doing is downloading another player (JW Player), it is not as fancy as flow player, but works perfectly on local computers without internet connection. Here is link to that player: http://www.longtailvideo.com/players/jw-flv-player/
This is not advertisement, but just a solution that we found. If you know any other good players feel free to link to them in the comments!