I put drivers in for rs cable if I use dcc programme it will not connect to dreabox and if I use flash wizard it says it is a 720 ???
without a doubt its a communication problem box to computer,your comp is not communicating with your box.
this is what i went through if its any help
https://www.digitalworldz.co.uk/index.php?threads/305679/
plus
you must have lan cable from router to dreambox and usb serial from laptop to dreambox
according to the manual at DMM you can flash the DM500-800HD without connecting the LAN (ethernet) and just using the USB , but THIS DOES NOT WORK - flashing fails every time. SO you HAVE to connect both LAN and USB between PC and dreambox and follow the instructions exactly.
1. switch the box off.
2. Plugin LAN cable AND USB connect to PC.
3. Start dreamup on PC.
4. Tick the 'use network' box in dreamup
5. Set your PC ip address in top left (where it says "local IP(PC)")
6. Set an IP for your dreambox in "Remote IP(box)".
7. Select the COM port which is your newly installed UART bridge COM port (I guess it will be COM15.
8. Click "Connect"
9. It should tell you to switch the DM500-800HD on.
10. Switch on the DM500-800HD and it should download the "flash loader"
11. When it finishes, click on "Flash", select the image you want to download.
12. It should now download the image to the dreambox and start flashing it. Wait for it to finish. Do not switch the dreambox off while it is doing it. It takes a couple of minutes.
13. Switch the box off and then on. It should now boot the new image.
Dont worry mate we will get there in the end.People on here know more about DMM than steven hawkins knows about science ,maybe not me but there are plenty others it will be cracked soon just keep at it as it will be something stupidly simple i bet.