I have found out this issue might be caused by the bootloader.
I have tried to update with the latest version (dreambox-secondstage_72-r0_dm800.ipk)
I have uploaded the package to my DM800.
I have opened a telnet connection and executed the following commands
Through a telnet connection, I have executed the following :
cd /
ipkg install /tmp/dreambox-secondstage_72-r0_dm800.ipk
I had the following error message:
***raw flash write tool. Don't have bad sectors or it won't work.
***uncompressing.../proc/stb/info/model doesn't exist...abort flashing!
I have checked my DM800 and it seems to be a geniune version (mac address, security hologram, screws, etc.)