Cannot mirror 3rd partition of Disk 0

I have two 1TB hard drives in my system, and I'm trying to get the second one to mirror the first. The first disk has three partitions - System Reserved, Windows 7, and Data. I was able to successfully mirror the first two partitions through Disk Management, but I do not have the option to "Add Mirror" when I right click the third partition. Please see the screenshot for a visual representation of my problem. How do I mirror the third partition?

Ditto

I have the same problem, same screen shot. Is there a limit of two for the number of mirror'ed partitions that is not advertised?

Problem 'resolved' by using Disk Management Utility to shrink the original partition 1, originally a 100 MB system reserved area use by the Win7 file encryption system, to the minimum of 82 MB. This gave back enough space to allow for mirror'ing of all three partitions. I then deleted all the mirror'ed partitions and started over mirror'ing one original partition at a time. My solution is far from solid but it did work this time around.