MacBook Pro :: Can't Load The IVR Files?

I have a dvd-r that has a bunch of IVR video files and some text files that I use for school. For some reason when I put this dvd into the macbook It prompted me as if I had inserted a blank cd. I knew it wasn't blank because I have used it on my old windows laptop. Knowing this, I put the disk into my windows laptop, ran it, and pulled up the content. Then I tranfered all the files from the disk to a external hard drive and pluged that into my mbp. The Mac could now see  all the files including the IVR fomated files(??) but did not know which program to open the IVR files with. So I drug the IVR files in to my VLC player and it reconised them but showed them as being 00:00 long and played no content. This was confusing because VLC usually could play these files. To be sure that it wasn't just VLC, I downloaded Real Player ( IVR native player) and tried playing them in that but got the same 00:00 play length and no playback. What I want to know is why didn't my mbp reconise the dvd-r and are IVR files just not compatible with OSX or is there somthing else I could should do?

Info:
MacBook
Pro, Mac OS X (10.7.3)