Aaron,
Take a look at your General Setup profile. Under Advanced, RTK/DGPS, you need to set the rate to be 0.2.
it is recommended to use the 1HZ for the actual broadcast rate though. In which case you would want to also select the check mark for Up-sampling on the same screen that you set the RTK rate.
strange...my browser did not display Shawn and Matt's reply until I answered???