Please kindly make sure that you are using the latest version of Sothink Video Encoder for Adobe Flash and the program is from www.sothinkmedia.com
Besides, please advise if you have the problem with the specific file you mentioned or with every file?
If the problem is only with the very file you referred to, please kindly provide the following information to firstname.lastname@example.org
for us to have further check:
1. your OS information
2. the version of your program
3. the screen shot of your conversion settings
4. the original file (If the file is large in size please try to send it with YouSendIt or things alike)
Thanks for your co-operation and understanding!
If you need further assistance, feel free to let us know.
Have a nice day!