adobeflash player ver. 11.8.800.94.0 keeps stopping and starting during video. How do I correct this

The newly downloaded version of Adobe Flash player 11.8.800.94.0 keeps stopping and starting during video presentation.  I have to keep mouse cusor moving on the screen to prevent the video stopping. The previous version I had did not have this problem. Nothing else has changed on my system.  What is wrong here and how do I correct it?