How to access a double encrypted partition?

I reinstalled openSuse to upgrade to version 11.2.
Reformatted everything in ext4.
Except for a partition where i store my files (which was encrypted)
The installation manager did’t let me mount that partition, so after 3 attempts i decided not to mount it.
The problem is, under those 3 attempts (you know that on every attempt you have to configure every time your installation) i changed the password for the encrypted partition.
So now when i want to mount it, it apparently does something with the new password, but no files appear on the partition, so i think i kinda double encrypted it with the two passwords…
Any ideas???