Why does the VST 'NI Massive' Close down FL Studio when it is loaded?

I have purchased NI Massive very recently and it has worked fine. A few days ago I had tried to load it through Fruity Loops 10 and they both closed down. I have tried to open it several times since then and it just keeps closing down. I have performed a defrag and cleaned up my hard drive and it hasn't changed anything, what could be causing this and how do I solve it?