I don't have Zorro S but according to the manual its available. But possibly only through the API (I assume this refers to [TRADE] mode only).
It should also be available in [TEST] mode on Zorro S or else it wouldn't make sense.
Have you checked you have t6 files for the instrument/s your looking at? Also, I believe to be utilising t6 files you need to use a non-tick timeperiod; ie M1 and above (maybe multi-tick bars that are sub-minute in length may be ok too but you'd have to make those yourself; either way JCL should clear that up soon enough).
Cheers,
BobbyT