ML350 G6 can't see BBWC

I've installed the BBWC 512MB upgrade in a ProLiant ML350 G6, but when I look at the p410i Controller Settings, it doesn't show any batteries as being installed.  If I go to Diagnostics, it shows my battery count as 0 and failed batteries as 0.  It recognizes the controller memory size as 512MB, but it's as if the BBWC doesn't exist.

LED1 on the battery pack is steady green and all other lights are off.  Am I missing something here?  I need to perform an online expansion of a RAID 5 array and need that BBWC recognized to do so.

Thanks!