I have a NEC ND-2510A, and Ive been having a problem. I recently bought a pack of memorex and imation DVD-Rs they dont work, but Ive been buying these sorts of brands for a long time, Nero says illegal disc and DVD decrypter just fails. But I have some cheap generic brand of DVD-Rs (no name on them) and they work fine and so does my memorex DVD-RWs that ive had for more than a year. Ive updated firmware to the newest 2.19 off the NEC site. So Im stuck and please help.