data recovery on old encripted hard drive

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http://askubuntu.com – hi i am trying to work out how to recover the data from the hard drive that was in my old laptop. it was running the latest ubuntu and i am now running ubuntu satanic 11.04 as i do not like 11.10. the drive was encripted and have it now in a external usb drive. have tried chown and advanced chown and still it is not showing me the contents of the home folder. am starting to be at a loss what to do as there is quite a large amount of data on there that is pretty important to me. the old OS is pretty irrelevant and i will be using the drive for a backup once i can get the data recovered. was the (HowTos)