DM 500C not working

[DMG]

My DM 500c what working fine and then stop, I try to flash it but Dream up did not read it why is this?

[DJMark]

try connect your box with dcc if you cant get it connected try connect direct through the ftp ie ftp://youripaddy if you cant get connected via any of these i would think something is wrong with the box

[mini]

What cable are you using to flash, if using dreamup then you need a null modem cable.