How to access encrypted home folder (mounted on separated partition) from another trisquel installation

Hi guys,

after installing another Trisquel on my PC (my HD has a partition setting for 4 different distros), the GRUB thing got updated (it was Debian's). Ever since then, I can't log in on my old nice Trisquel I was using before.

I wanna access my Home folder, which has a partition of its own. But since it's encrypted (I do have the keyword), it "mounts", lets me access the folder, but then it has a file called "Access-Your-Private-Data.desktop" instead of its contents. I suppose this "Access-Your-Private-Data.desktop" file just kinda runs "/usr/bin/ecryptfs-mount-private" on the cmd, cus of properties and there's also a README file saying:

"THIS DIRECTORY HAS BEEN UNMOUNTED TO PROTECT YOUR DATA.

From the graphical desktop, click on:
"Access Your Private Data"

or

From the command line, run:
ecryptfs-mount-private"

But whatever I do, nothing really happens. When I double click the file, it opens blinks a terminal on the screen and that's it. When I run the command on the cmd this is what I get:

li@li:~$ sudo ecryptfs-mount-private
ERROR: Encrypted private directory is not setup properly

what should i do?

(the pits