Encrypted external USB drive won't mount automatically

I have an encryped exteal USB drive that I use for rsnapshot backups, so I'd like to mount it automatically.
My fstab entry did look like this, but it would hang at boot, saying that the disk drive is not ready... press s to skip..., even though the drive was plugged in and tued on.
/dev/mapper/luks-3bddbc2d-6432-46df-9851-c86e15478ded /media/Maxtor1 ext4 defaults 0 2
mount -a would mount it.

I changed it to this, so it doesn't hang the boot
/dev/mapper/luks-3bddbc2d-6432-46df-9851-c86e15478ded /media/Maxtor1 ext4 nobootwait 0 2

mount -a still works, but I would like to get it to boot automatically.

Edit:
I just added to fstab
/dev/mapper/luks-3bddbc2d-6432-46df-9851-c86e15478ded /media/Maxtor1 ext4 nobootwait,rw,suid,dev,exec,auto,user,async 0 2

Now mount -a failed,
mount: special device /dev/mapper/luks-3bddbc2d-6432-46df-9851-c86e15478ded does not exist

But, it still mounted, when I clicked the file system in the GUI is was there.