I have a My Book Essentials external drive installed on my system with the wd software installed for it. I want to add a My Book Studio Edition II to my system as a raid drive. When I follow the documentaion I printed out from the cd that came with the Studio Edition, When i plug in the Studio Edition II drive it lights up but the wd drive manager does not show up in the task bar or flash. Could the software for the Essintials be interfering with the Studio Edition II software? I want to keep both drives in use on my system. Just need to get the new drive up and running. Any help would be appreciated.