cannot exand Smart-2/P

[tato386]

I currently have one RAID 5 array that consist of 9 9.1Gb drives. I used to have three logical drives defined of various sizes within this array. I have deleted one of the logical drives and now have 30GB of free space. I would like to use that free space to expand one of the two remaining logical drives but I am not given the option the the array config utility. The sa-2/p does have a cache and it is enabled. Is there something I am missing here?

Thanks,