Replying to Is it possible to fuck up a CAST mount?

I just got my CAST system mounted and picked up from the shop. Is it possible to fuck up a mount so that the toes won't change out? I cannot get the toes to pop off the plate no matter how hard I try. Online I see people striking it firmly with the heel of their hand and it pops out, I've been smashing my toes with a textbook way harder than I could strike with my hand and the fuckers move like 1/5 of a cm but won't go from the small hole to the big hole to release. I can't go back to the shop until tomorrow.
Any suggestions? or are these just a pain in the ass the first few times?