Video player won't stay open

Hi, please help wise people!

Creating a score for a short film using midi from Reason 5 Rewired with Cubase 5. Project is all set up, everything working perfectly with Win7 on dual monitors. One minor problem…the video window will not stay open when clicking on Reason even tho on a separate monitor to Cubase. Minor but important to watch video along with creating midi tracks. Searched for answers to no avail. Please somebody have a fix!!!