There are several possible error sources:

• The application has been installed after Remote Buddy has already been launched

  For efficiency reasons, Remote Buddy only searches for supported applications when its started. If you have installed an application after launching Remote Buddy, please quit Remote Buddy and launch it anew.

• Oudated program versions

  The installed version of the program in question could be outdated and identify itself with a different Bundle Identifier than the version supported by Remote Buddy. This problem often occurs with Mplayer OS X. The most recent version of that application is not to be found on Sourceforge but on directly on the pages of Mplayer HQ.

• Custom menus

  If you use a custom menu in Remote Buddy and you don't make use of Remote Buddy's smart folders, the menu structure is static. You have to manually add the behaviour into a place of your choice in the menu.

• The behaviour is deactivated.

  Make sure, the checkbox in front of the Behaviour's name in the Mappings pane of the preferences is active.

• The Launch Services database is outdated.

  Remote Buddy uses Launch Services to check for the availability of an application on your Mac. If the Launch Services database of OS X is incomplete or outdated, so is Remote Buddy's dynamically created menu. The solution, though is easy. Download LSRefresh, launch it, select the application(s) that don't turn up in Remote Buddy's menu, wait until the update is finished and then restart Remote Buddy.

1) Open the Remote Buddy Preferences via the pulldown-menu and choose "Mapping".
2) Choose the mapping you want to modify.
3) Select "Custom actions" for the button you want to map to an action of your own.
4) Create the action you need using the appearing editor.