Hey there, lpeyt9ml!
I'm very sorry to hear about your issues with the WD My Passport Ultra!
I'd suggest to try using a different USB cable.
If that doesn't help, I'd also try plugging it in another computer to see if it will get recognized there.
Is it a new external hard drive or you have data on it?
Another thing you should try is installing Data LifeGuard Diagnostics to test the drive's health.
Here's a link to the utility:
http://products.wdc.com/support/kb.ashx?id=u5AtY0
Keep me posted! Hope this helps you!
SuperSoph_WD