Ok, I have followed this thread from the start, but nobody reported DW-22A related problem looking like mine:
I can burn and read regular CDs without problem. DVD data discs are also burned perfectly well. I can also create regular copies of DVD movies which can be played (almost) without a glitch on my standalone DVD player. However, whenever I try to play a DVD movie (manufactured or burned, does not make any difference) in my DW-22A burner, the picture freezes from time to time for a few seconds. These delays become more frequent as time passes. At the same time, some standard DVD actions like 'go to next chapter' take awfully lot of time to complete. Everything gets so sluggish, so slow, and in most cases DVD playback stops sooner or later.
It seems that DVD playback 'spoils' the burner's XP driver somehow! (that's why I'm posting this reply). Here is the main problem: when I remove DVD movie from the burner and try to use the burner for other (previously perfectly performed) tasks, it keeps its sluggish performance. In fact, the drive is no longer capable to complete even the simplest writing task. It cannot even read ordinary CDs burned in the same drive a day ago. Simply, the drive becomes completely unusable.
To bring the burner back to life, it is not enough just to reboot the computer. Basically, I have to delete CD/DVD drivers from the DeviceManager and leave to WindowsXP to recover them on the next reboot through Plug&Play.
I have replaced BYS2 firmware (delivered with the burner) with BYS3, with no improvement at all.
Please, help, this becomes very, very annoying.