DMPVV - Updating Firmware on R805 with DRAC 5

Hi all

I've just installed and configured the Dell Management Plugin for VMware vCenter (mouthful!) and have successfully managed to update our new R815s running ESX 5.1.

When I run a connection test against our old R805s (ESX 5.1 also) I can successfully connect via Host Credentials (after running the fix compliance issues wizard). However, the iDRAC Credentials just displays "Not Applicable For This System". As such, the update firmware link against this host is greyed out...

What does this mean? Am I unable to update the firmware for any ESX server in our fleet running on DRAC 5s at all?

Any help would be much appreciated!

Regards,

Marty