Jay wrote:

Nope, I ran out of warranty last year

In that case I'd personally try removing the drive
from the enclosure and see it can be seen as an
internal drive in the system, not in the enclosure.

Not a good idea if its under warranty, but since its not
and the data is important, worth trying because it may
just be the bridge that's got killed and not the drive itself.

If the drive doesnt work in the system, you'll have
to decide if the data is important enough to be
worth the cost of pro recovery. That aint cheap.