Why can't I set the slice size to 100%?

Question

HTML

I cut slices, save for web - but flash does not allow me to set 100% size.
https://yadi.sk/i/Rkwv61lKbrzE5

Answer 1

I just tried it (I had never touched the slice tool before, I could have messed up) - I opened png, made two slices, ctrl + shift + alt + s, I select a slice, I try different image formats - everything is saved 100% fine. Windows 7 Ultimate, Adobe CS6