How to fix a stuck attachment on a Kitchenaid mixer

I am unable to change the attachments on my Kitchen Aide. It wont push up in order for me to turn it an pull it off

crwdns2934089:0crwdne2934089:0 crwdns2934093:0crwdne2934093:0

crwdns2934109:0crwdne2934109:0

crwdns2889612:0crwdne2889612:0 0
crwdns2934285:0crwdne2934285:0