Unable to Register WD 10TB NAS Red drives

WD Internal Drives Internal Drives
1

We are from Sri Lanka.

These are our Serial Numbers of WD NAS HDD which we recently brought from http://bhphotovideo.com/.

VGC51VEP

VGC8TH5P

VGCUGGP

VGC8UUBP

What would be the reason for not being able to register?

Thank you.