Cacti not graphing CPU on Dell R720 dual hex core on 2008

[geekjitsu]

we're monitoring a few hundred Windows servers and I've recently noticed that all the Dell R720 w/ Intel E5-2640 hex cores display a CPU graph that shows the full CPU count (24), but isn't graphing the CPU usage. I've attached an example.

cacti-hexcore.png (16.51 KiB) Viewed 1415 times

This is Cacti Version 0.8.8a running on RHEL 5.

This graph template that is being used is BMI HS22 6-Core CPU GT.

Any ideas on how I can get the CPU usage to start graphing?

Thanks in advance!

[geekjitsu]

I should have noted that this is only about 40 of 500 servers. All the rest the CPU use is graphing without issue.

[BSOD2600]

After following http://forums.cacti.net/viewtopic.php?f=3&t=11747 what did you find the root problem to be?