Why can't I view files on a DVD-R on my PC?

The video files were burned to the DVD-R from files downloaded from a flashdrive. When I try to use the DVD-R, a message comes up "sADPCMv2.dll is missing from computer-reinstall to fix problem." What should I do?

TJ2010-11-16T09:09:36Z

Go to my computer and then CD then change the settings.