Help with sky anytime PC

[Ray]

Hi - can anyone help me with this. I've installed anytime on XP, it's all working fine on the install, account management and downloading content side - EXCEPT when I download a movie it stays small in the centre of the player window. I can't get it to go full screen. I've got all the upgrades and am using WMP 11 and everything it has asked for. Am I being a total stupid noob here or is there a clever button I'm missing. How do i get it to go full screen (or at least across the screen)?