Greetings, Whilst what Steve says may well be the answer, I had the same problem and somehow, on the recorder the USB setting had changed. When I reset back to to variable from pc, the settings on my DN550 are variable, pc, ac-adaptor. This can be found under the device settings menu. Once set to pc I've had no further problems. ** To leave the list, click on the immediately-following link:- ** [mailto:access-uk-request@xxxxxxxxxxxxx?subject=unsubscribe] ** If this link doesn't work then send a message to: ** access-uk-request@xxxxxxxxxxxxx ** and in the Subject line type ** unsubscribe ** For other list commands such as vacation mode, click on the ** immediately-following link:- ** [mailto:access-uk-request@xxxxxxxxxxxxx?subject=faq] ** or send a message, to ** access-uk-request@xxxxxxxxxxxxx with the Subject:- faq