What OS? Display drivers up to date? What version of MajicBullet? There is not enough info to hazzard a guess.
Windows 7. Magic Bullet Looks for After Effects CS5. Just updated my display drivers.
Just updated my display drivers.
Then un-update them. MBL is, after all, driven by OpenGL and may frown on the slightest variation there. Also inquire with Red Giant Software what driver versions they support.