ok, had this problem before, and came up with an easy solution.. The only problem is it was for a couple oz of bubble that wasn't quite sticky/plyable.
take the chunks and chop them down until you have a lot of hash crumbs.
I took all the crumbs I could and put them into a vacuum sealable bag..
vacuum seal the crumbs all together in the center of the bag- try and get it as tight as possible.. no air whatsoever.
put some water on the stove and heat it to 180-190*f. take the vaccuum sealed bag and place it in the warm water until the majority of the materials are soft. this should only take a minute.. too long and it'll turn into goo.. I tried to get the crumbs to be very soft but not liquid soft, if that makes sense.
Take the vaccuum sealed warm hash crumb bag out of the pan, put on a solid surface, put a book or big flat piece of whatever on top(don't puncture the vaccuum bag, whatever you do) and press the bag like there's no tomorrow..
You'll end up with a marbled pressed mixbag of sub-par hash. it should be softer and bonded together.
Like THG said, it's prolly got too much plant material in it.. thats why it's not acting like an oil or glue.