That depends on what you mean by "when I go into VISTA". You may not be able to see the new RAID 1 volume in Windows Explorer or My Computer yet. Have a look in Control Panel > Administrative Tools > Computer Management > Disk Management. That will give you a better sense of the status of the new RAID volume. For example, you may have set it up correctly but not yet have defined any partitions, or you might have a partition that's not formatted yet.
Sorry, I did not make that clear. Disk management is not seeing it, so I cannot do anything with it.