What's wrong with this script logic for time offset?

I am trying to copy the actual values for three months of 2014 to plan values for 2015 using script logic, in other words, moving Jan 2014 actual values to Jan 2015 plan values.  

My script is validated with no errors, but is not updating the 2015 plan values as expected.

Here's the code:

*XDIM_MEMBERSET ACCOUNT=NET_SALES

*XDIM_MEMBERSET CATEGORY=ACTUAL

*XDIM_MEMBERSET ENTITY=1000

*XDIM_MEMBERSET=BAS(2014.Q1)

*WHEN TIME

*IS BAS(2014.Q1)

*REC(FACTOR=1,CATEGORY="PLAN",TIME.NEXT(12))

*ENDWHEN

*COMMIT

I have also tried

*REC(FACTOR=1,CATEGORY="PLAN",TIME=NEXT(12) // Member "NEXT(12)" does not exist

*REC(FACTOR=1,CATEGORY="PLAN",TIME=TIME.NEXT(12)) // Attribute "Next(12)" does not exist in dimension "TIME"

I know I could use a data manager package to do this but I am trying to understand how time offset works in a simple example. 

Thanks,

Bob