Can't bleed air out of rear brakes

Or,,you could just take the new one apart and see whats wrong with it. Theyre not real complicated devises. and chances are that its a simple fix. At least thats what I would do. Cause Im always curious how others screw up, so I can learn what not to do.
I learned to "take things apart" at a very young age. It frustrated my mom to no end, cause a lot of the time, whatever I "took apart" was not then reassembleable.Eventually I learned to plan ahead so as not to "break" stuff.