dude, where's my animation window?

I'm sure I'm just being REALLY stupid, but I've never had this problem before, and I can't find my animation window in ImageReady. I was hoping someone could help! I've seen this happen to people before, and it's just hiding behind a different window, but that's not it cos I've checked. I also checked that I have animation selected in the window menu. I can't for the life of me work it out :s and now I'm beginning to think I've gone mad or am being really stupid...

screenshot

Thanks in advance! (also, I hope this is okay to post here...)