kodak easy share help?

it isent letting me upload pictures and videos to my computer. it worked before now just every time i try to upload it to my computer it says it cant upload then it says cancel or try again so i try again and it doesent work. does anyone no why? do i have to download something to make it work?and i dont have a spot where i can put the sd card in on my computer and i dont have a printer/fax machine to put it in there so please help