Sorry to say if you don't provide more details on what you tried and on what happened, no one will be able to help you.

- did you follow the steps above?
- does the script kick the user out of the channel? is there a notice sent after the kick? what kind of notice?
- do you get any error messages again?
- did you try "soldatserver" instead of "soldatserver.exe"?
- is there any activity in the prompt (window) of soldatserver.exe?
- if you run cmd.exe (/run cmd) and instead of "soldatserver.exe" you put "cmd.exe" for %app, does it send the command to the window of cmd.exe?

Finally, what System and what mIRC version are you running this at?