I would try a shortcut
"C:\Program Files\Wolfenstein - Enemy Territory\ETDED.exe" +set fs_game fritzbot +set com_hunkmegs 64 +set dedicated 2 +exec server.cfg
Correct for whatever directory your ET is in and set the working directory too.
You can also include g_gametype for campaign/objective as well as a map, campaign or rotation file to load too.
Read the
wiki section on dedicated servers too.