Loading historical data with 0CO_PC_ACT_02

Hello,

    I need to load historical values with infosource 0CO_PC_ACT_02.  I can load the current period, but get no data from R/3 for historical periods.  When I run RSA3 on R/3 for a historical period, I get no data, so I don't believe that this is a BW Issue.

    My question:

   1.  Is there a job or something on R/3 I need to run to enable this data source to pull historical data?  If so, what is it and how do I run it?

   2.  Is this data source simply not able to pull historical data?

Thanks.

Dave