Slow read and burn speed

I am using windowa xp, and I have a Pioneer burner model DVR-1910LS it used to take about 24 min. to copy and burn a movie. Just recently it started taking about 2 hours to copy and burn a movie. Does anyone have any idea why this would just start happening? I have even tried a new burner same model but that did not help.

start by clicking on reset dma in dvdfab settings

Thank you I will try that.