There's a document on creating server side admin commands
here that also links to a bunch of "out of the box" admin commands for some common uses.
Make sure you are adding the commands to the admin.dat when the server is not running. At each map change, tremded rewrites the admin.dat, so if you have modified the file without running the !readconfig command on the tremded server, those changes will be overwritten.
You should check the commands in the individual command files you are creating, if they will not run as printed on the tremded server console, they will not run as an admin command.
Also, you may want to check your caps button, it appears to be stuck
