SDK needs to be updated to be able to use fr255*, fr955

Downloaded the new fr255*, fr955 devices in the SDK manager, the latest sdk is still 4.1.3, but still, when I run my DF (that runs on fr245) on fr255 I get this error:

"The currently running device does not support this function. Please see if there is a device in the Connect IQ SDK Manager."

The code is:

class BaseExtHRMField extends Ui.DataField {
 function initialize() {
  DataField.initialize(); // in this line I get the error
 }
}