Remove Encryption from x64 Vista

I have a hard drive with a non-bootable image of vista enterprise x64 installed, and I need to recover encrypted data from this drive. The drive will mount in a working vista x64 environment but I cannot find a way to remove the encryption from that drive to extract the data. Does anyone know how to remove encryption from a USB mounted disk drive?

My current attempts to relocate this data include the following:
1. Copy & Paste from bad drive to working drive under user that has permission to access the encryption folder. Access Denied.
2. Removed encryption from working drive OS, in hopes that this will remove the encryption from all mounted drives. (More so a Hail Mary than anything else.) - Failed
3. Booted with x64 bit Recovery Console to attempt to explore to files to have them relocated. - Access Denied.
4. Attempted to move folder to compressed zip to remove encryption within recovery console and working vista hard drive environment. - Access Denied.
5. Booted into Linux environment to copy files to working drive. Permission Denied.
6. Ran chkdsk /f on bad drive from recovery console and currently attempting Startup Repair to restore disk to attempt boot to recover data. Will attempt to edit registry of mounted drive within recovery console when attempted restore is complete.

Issue resolved. Our network administrators use network encryption not local encryption on this folder. Machine name was incorrect and the policies for the user were incorrect based on the policies that were available to the username located in the correct 'container.' Access regained to files and files backed up to new working vista drive. Problem Resolved.