0</option></userinput> from a terminal will give you a lot of debug output,
some of which might help you to diagnose the problem. Trying this in
conjunction with using <command>artsplay</command> in a second terminal can give a wealth of information. If an <application>artsd</application> instance is already running, exit it with <userinput><command>artsshell
Assuming you've installed &arts; correctly and you still have the codecs installed your previous &tde; installation needed, chances are this is a small problem with your <filename>knotifyrc</filename>. To confirm this, try creating an entirely new user and seeing if system notifications work under the new account. If they do, try moving your <filename>$<envar>TDEHOME</envar>/share/config/knotifyrc</filename> out of the way for your original user to see if this solves the problem.