We never tested OpenPLI on a DM800, in order to fix this issue please add "sundtek" in skype or join our online chat.
Please note our support will be available again from Wednesday - we are currently all finalizing DVB-S/S2 support today.
On a dreambox by default we only install drivers for the Gemini Image, however as you noticed the mipsel2 build in the driver seems to work for it but we need to modify the installer to set up the correct driver on it.