That sounds more like your firmware doesn't support the +/-RWs media codes. :iagree:
You will need to upgrade firmware (NOT B4S6).
Go to my site. Go to tools&software. Download Lite-On EEPROM Utility v3.0.4. Open. Click Backup EEPROM. Save to a safe place. NEVER DELETE THIS FILE. It is your drive's "lifeline"
Go to Firmware, Lite-On SOHW-1653S, download CS0M-Patched. Click 1653S.CS0M.patched-cf.exe, click yes to warning. Select your Teac DV-W516G B4S2. Click update. Reboot when done. Let me know when you have done that.