Problem w/111d firmware update

Have pioneer DVR-111d that have had for awhile. Just started to use DVD
burn capabilities. Have burned several CD’s. Came to this website to learn more and discovered about firmware updates.
Downloaded and updated FW 1.29 from Pioneer. No longer will play DVD’s.
Get error message from windows in both PowerDVD and WinMedia Player.
Any suggestions

Did you reboot after flashing?

Yes! rebooted system