Pictures Of People Roller Skating At Roller Rinks How Do I Dismantle Roller Skates?

How do I dismantle roller skates? - pictures of people roller skating at roller rinks

I take the wheels of my skates. I tried to loosen the screws, but they are very close and it seems to work. How can we dismantle these skates? I can not upload a photo because I can not find the camera ... But I show an image of the runners as they do.

http://www.flickr.com/photos/matz-o-man/537641930/

My screws) are slightly different (and more money, but apart from that it is the same. How can I wheels?