I'm sorry but that is not enough information for me to help you.
You will need to explain exactly what you tried to do, and what kinds of error messages you are receiving. There is no other way we can help you.
For example:
1. I imported the command xml.
2. I saved and closed the command tree.
3. I executed the "List" command by saying "Refresh Tellus devices"
4. VoxCommando understood me and seemed to execute the command, but I see orange error messages in the History window and when I look at the telldus.xml payload XML file it is empty.
5. I enabled logging in VoxCommando and executed the "List" command again.
6. I have attached my log file to this post.
http://voxcommando.com/mediawiki/index.php?title=LogNOTE: If it is difficult for you to write in English, please feel free to write in your own language. It is more important that you explain exactly what you are doing and what is happening. We can use Google Translate to read your explanation.