Uhg, nothing but problems with these passports. WD is sending my most recent passport failure to a data recovery lab. Lucky me, at least they are paying for it.
I would FIRST, try it on a different computer.
Common issues with these drives are
Detects as Bad PCB device
Keeps disconnecting
Detects but can't access (doesn't appear in drive management)
Can access, but all the data appears to be missing
USB bus voltage starvation
and probably a few others I haven't seen.
Your best bet is to talk to WD support, post your question/issue in the 'portable drives' section of their forum and try to get the case escalated to an engineer.