boxer not sleeping

Question
I have a 1 year old boxer who refuses to sleep at night when it is time for bed. We have tried keeping her in her cage and after 3 weeks of her never settling down and her cutting her paws and mouth we let her out. We have put down a blanket for her beside myside of the bed and she will sleep for about 1 -2 hours and then she is back up wanting to play or just to have my husband or I up.  We have even tried a BIG no no with us and let her come in the bed with us but that did not work either so after 3 nights of that she was back to the floor.  She will sleep after someone is up with her for about 20 minutes but it has to be on the couch with you.  She is in her cage for 8 hours with toys while we are at work and then she is out until the next day and we play with her while she is out and she get to go outside and run and play too.  Is there any advise you can give me on how to make this dog sleep at night when it is bedtime for us parents?

Answer
I can sure give you advice, but this is likely one of those answers that you might not want to hear LOL.
Boxers are very high energy dogs. Your dog is still a puppy and even if she weren't,as I said they are high energy dogs. She is not getting nearly enough exercise. She needs to be power walked a minimum of forty five minutes per day. Every single day, preferably twice per day. Rain shine sleet or snow. At least three times per week she needs some heavy duty exercise, meaning until her tongue hangs out. Not play alone in the yard exercise which is the mistake most people make. But playing fetch until she drops,. or frisbee, or running while you're on roller blades or a skateboard. Even a treadmill is better than nothing. These dogs are NOT couch potatoes even as adults. She needs to be in an obedience class for socialization and training and just to work her brain and body.
She needs to have toys that work her as well, in the back yard, like a tether ball on a pole, knotted ropes hung in strategic places at different heights for chewing and tugging. Different sized balls from beach ball sized to tennis ball sized. Toys that work her mind and teeth, such as kongs stuffed with treats, and other 'smart' toys that you can stuff with treats and she has to figure out how to work the treats out. These toys need to be put out a few at a time and changed every few days to keep her interested. When I say she needs hard work three times per week, please understand I mean TIRE her out. If you don't start implementing these things into your, and her life you are going to unfortunately end up with a very stressed out, miserable dog who is going to develop OCD behaviors and become destructive, not only to her environment, which you've already seen with her crate, but to herself if she can't get to anything else. Think dog parks, doggie sports like fly ball, or frisbee, as I said already obedience training, doggie day care if necessary. You have GOT to get her out of that cage and get her feet and mind moving. Otherwise I'm sorry to say this is going to continue to worsen, even to the point that she could develop very neurotic behavior,
I hate to be the bearer of this kind of news, but I have a responsibility to be honest with people. For the dogs sake but for the owners as well. I know that you are loving, responsible owners, or you wouldn't be here asking for help.
best of luck
Cindi