This is why you use RW discs
You use an RW disc in the deck, and then copy it through your PC to -R or +R disc. Use the LOWEST burning speed that you can select.
Some players cannot read "ALL" formats. Most DVRs are either +R or -R, but NOT both.
Most PC burners are now triple format -R/-RW/+R/+RW/RAM and Dual Layer capable, but burning at too high a speed often results in a disc that cannot be read in other machines.