I have a itunes account and have set up my ipad with it.(sync) what i need to do is get rid of all the pictures i have downloaded from my mac. i go back to photos under itunes uncheck all the folders and hit apply then sync. its doing something for at least 5 minutes then gives me a window saying --the ipads **********cannot be synced you do not have the privlieges to make changes.
can i get step by step instructions on how to delete these photos?

thanks, Mark