Did you choose ACRO for the fight model when you were setting up your first Model Memory ID?
Flight Mode switch SW3 can be activated to the batt terminal plug in on the receiver (ch6). Read the bottom of page 35 (FLPN flaperon) to activate ch6 within radio programming. Plug your shift servo into the batt terminal and then go through the servo adjustment menu to adjust neutral (sub trim) and EPA (end point adjustments) for servo travel so your transmission is engaging 1st & 3rd properly.
http://hitecrcd.com/images/products/...c6Sport2.4.pdf