Pat C.,
Your first problem is to get the stuck case out.
There are many, many ways to get this accomplished and I'm not going into all of them. Depending upon your die set, un-screw the depriming/expanding rod and spray some 'liquid wrench' or WD-40 or what ever penetrating oil you have. Let it soak in and extract the brass. Clean the die very well after getting the case out. Another way is to (if you can) remove the die from the press and stick it into the freezer. Brass shrinks more than steel/iron. (Cold enough to freeze the balls off of a brass monkey. The monkey is the name given to a brass rack used to hold iron cannon balls in one place on a sailing ship - get your mind out of the gutter.)
Now to why did the case stuck. You stated that you used "the lube". Not knowing what lube, all I can say is the area that needs the lube is the side walls of the case, not the neck. Cleaning the brass is NOT a requirement. It only protects your die from un-needed ware and possible damage. Grit/sand will be pressed into the brass. Cleaning is a good idea because of this.
Getting a case stuck is a frustrating thing to happen. I know, I've done it (too many times).