Duplicating Encrypted Hard Drive

Hi,

 I have a hard drive that is encrypted by Microsoft  BitLocker. The hard drive is running Windows 7 Ultimate OS inside the laptop and it runs fine except it hesitates to respond sometimes. When I checked System in Event Viewer, I saw some DISK related errors. So I decide to replace it with the new hard drive. BTW I could not fix the error using Seagate Seatools for Windows.
I decided to use Paragon Hard Disk Copy software to duplicate the hard drive so that I don't have to load OS and all other software and join the compute to the domain.
But Paragon stops copying with the prompt "There are errors ... do you want this errors to be fixed and continue?".
If I clicked YES, then it took hours, but eventually failed.
When I clicked No, then I saw an error "File system has allocation errors due to cross-linked files. Run OS build-in tools for checking and correcting this kind of errors.".
Is this because the original hard drive is encrypted by bit-locker?
After attaching this hard drive to my computer and tried open it in "My Computer", it was asking "Recovery Key" and I had to enter the key before starting HD duplication in Paragon.
So I am wondering if it is wise to do error checking on original laptop first and try to duplicate or I just can't duplicate encrypted HD?
I can always install OS from the scratch even though it takes hours to complete with all the software ...