Did you follow instructions referenced in post #5? You should at least get and error message such as “Data Disc” or something like that. If you get such error message, try powering off the recorder with the CD still in the recorder and power on again. I updated 2 5005 recorders without having to do the power off step, but the third one I did wouldn’t work until I did the power off step. If that still fails, try 1 of the other R2 firmwares from the link you gave or from http://www.pumapeople.com/liteon/. Note first 2 sets of 4 digits in serial number of unit being updated must match exactly with that of firmware used, or update will not proceed which is why it may be necessary to try different firmwares because there’s no way to tell those numbers until files are opened. FYI you can use CD-RW media to avoid wasting CDs if you wish. Good luck.