DVD drives don't recognise blank discs

Hi All,
I am new to Newbie Forum but I figure this is the best place to get accurate info. I recently installed a Lite On Combo SOHC-5236V, I also have a LG HL-DT-ST DVD Ram GSA-4160B installed. Neither of them will recognise blank discs CD/DVD they both play CD’s and DVD’s but when I want to back up something on them I get “please insert a writeable cd” message. I would appreciate any assistance.
Thanks

Your drive may recognize the newer discs. Is your firmware up to date? It should be A306.
http://forum.rpc1.org/dl_firmware.php?download_id=1923

Welcome to the forum.

The Liteon is a combo , so it will read/write CDs but only read DVDs.

Are you trying to burn CDs or DVDs. If it’s DVDs then I’ve explained about the Liteon & Dialysis1 has probably answered about the LG.

Thank you for your response. I will read the info more carefully next time. I apologise for the delay in answering.

I knew I had come to the right place, thanks for your response. I apologise for not answering sooner. I have updated the firmware, but I get a different message now. That being E:\ is not accessible invalid function. E:\ is my LG DVD burner.