[DirtSlasher]

Here is a short tutorial written by me on how to do what you are asking for:

1. Download Windows 0.3.7 SA-MP server files
2. Go to server.cfg and change whatever you wish, make sure you change the RCON Password
3. Add the filterscripts and the gamemode you wish
4. Run the server(make sure you are portforwarded
5. Give your Internet Protocol Address to your friends
6. Have fun

As for the error, read what 'NoSoap' has to say.

Regards,
DS