Kate,
This is the only drive that Currently works 100%. This is the only drive that we have been shipping for the last 6-9 months at least.
As they stated, check the version that you are running, and update to the latest version for support if you don't currently have the current version.
You do this by going into our Store account as stated in this FAQ:
http://www.mtu.com/support/faq/faq-website.htm