Dreamup with DM500HD doesn't flash into memory

Use this SW release DreamUP_1_3_3_6, connect the Dreambox to your Laptop via USB and crossed Ethernet cable, tick also the LAN within DreamUP, turn on the Dreambox, now wait a little bit to establish the connection (flash-loader should be transfered to the Dreambox and you should see something like HTTP or LAN connected) DON'T PUSH THE FLASH BUTTON Now unplug only the crossed Ethernet cable from the Dreambox and leave the USB cable connected, connect the Dreambox via Ethernet cable to your Router (DHCP enabled) -> look to the Ethernet connector at the Dreambox it's hopefully flashing! Now open up your IE or another browser, type in the IP of the Dreambox which you see in the DreamUP SW and now run the firmware-upgrage via your browser. Use the original firmware release-dm500hd-3.0.3.nfi, reboot the Dreambox and be a happy Dreambox user

I tried many many different ways, but this trick did it. So no need to RMA