C# and Flash

Hello!

I've written the program using C# that works with my flash movie. I used the AxShockwaveFlashObjects component in C# and ExternalInterface and fscommand in Flash. Everything works correctly on my mashine, but it doesn't work on the other mashine. Both of them have WinXP. Also the C# program works well with  other flash movies, so the problem is in my movie, apparently... but it works well on my mashine... What's wrong?? )

PS Sorry for my English! )