I using kopete 0.50.80 and the plugin "listening" (or something like that) dont show the music what i'm listening at the moment (i'm using amarok 1.4.9.1 and i configured the plugin to use this player).
What you could try is start Kopete from the command line (konsole), then type '/media' in the message field, hit the Send button, and see whether error messages appear in your konsole.
Could you tell me which version you are using of kde? Do you use Amarok-nightly?
I am using KDE 4.1.1 and Amarok-nightly and its working here without issues