stilltryin 0 Newbie Poster

Greetings - First post- be gentle!
Have a Plextor 740A internal DVD drive that I'm attempting to convert to external using Macally PHC - 500B enclosure. Trouble is the PC won't pick up drive through USB (This device cannot start (Code 10).) Checked drive by installing internally, no problems there, but running into a wall externally.
Set up jumper in the three different settings (master, slave, cable select) to no avail.
Any suggestions would be appreciated.
Thanks -
Stilltryin