I recently switched from a laptop running Windows XP to one running Windows 7. On my XP laptop, I was able to burn DVDs (avi files) using Roxio and play them on a Marantz DVD player. When I burn the DVDs on my new laptop (also using Roxio), they will play on the laptop but not on the DVD player. I tried to burn the DVDs with and without "verify" but neither will play on the DVD player. I'm using the same type of DVDs, burning the same type of files, and using the same DVD player. The only thing that is different is my laptop. What do I need to do to make it work? Thanks for your help!