Win32_PnPSignedDriver Diles to add to SMS_DEF.MOF

Hi ,

I a trying to add the "Win32_PnPSignedDriver" since I want to collect the driver version from the class.

I am keep getting the below failure on each attribute I am trying to add from this class:Failed to add an instance of class

"Failed to add an instance of class Win32_PnPSignedDriver to historical store: 80041002 InventoryAgent 1/24/2011 9:33:45 PM 5248 (0x1480)"

When I was looking for a sloution I have found that the problem might be that the key of the class is not valid since it is not holding any data(NULL) , the key of the class is the "Name" field.

Any suggestions would be appreciated