Extending a Partition by adding a disk to RAID 5

Hello,

I have a HP DL 380. I want to add one addition 146GB drive to a already built RAID. I shut the server down, added the disk, used HP Smart start disk to add the disk to the array. I then booted the server and I am now trying to extend the partition/volume out.

I know I have done this several times in years past but seem to be having trouble this time.  I keep getting this error? What am I missing?

Virtual Disk Service error:
The size of the extent is less than the minimum.

DISKPART

SELECT DISK

  Disk ###  Status         Size     Free     Dyn  Gpt
  --------  -------------  -------  -------  ---  ---
* Disk 0    Online          273 GB      0 B

DISKPART> extend

Virtual Disk Service error:
The size of the extent is less than the minimum.

EXTEND