Raid 1 on windows 2003 standard server…

I have a windows 2003 standard server which is a domain controller and a print server. As I wanted to do disk mirroring, I installed 2 hard drives (disk 0 and disk 1), changed both of them to dynamic disk and now when I try to add mirror for the disk 0, the ADD MIRROR… Option is in active. Please suggest how can Mirror my Server’s hard drive.

Kind Regards,
Satya Shrestha