I have the same bug in TSmedia v6.0. The plugin just suddenly stopped working, no changes were done in box or plugin config. When you start TSmedia, the screen does not show anything. If you press any button, a crossed square is displayed (the same icon displayed if pressed button is not available in the current mode).
I suspected that this happens because something changed in data, which is being downloaded at the startup of Tsmedia. So I disconnected box network, and Tsmedia started fine. Then I reconnected, and all streams worked as usual.
IMHO the bug is solved in new Tsmedia versions, but enigma2 v1.6 is not supported anymore by author, the last version was v6.0. So, here is a solution for those poor guys who still DM500HD and similar boxes:
1. Connect with FTP to your box.
2. Download the file /etc/hosts
3. Open file with text editor, add this line:
127.0.0.1 tunisia-dreambox.info
4. Save file and upload back to box to the same place.
This will prevent plugin from connecting to update server, but it will allow normal work.
A reboot might be needed, I don't remember.
