24cb876d_X_D_O_S_S__Adjustable_Seatpost__Solution_s_
[Issue] The seatpost does not move into Trail mode when the short lever is pressed, or does not move into Descend mode when the long lever is pressed. [Probable Cause(s)] Not enough preload tension on the remote cable. [Solution(s)] 
Adjust your remote cable tension with the cable adjuster until you achieve a small amount of free play with the long remote lever (1 to 2 clicks).
FOX D.O.S.S. Adjustable Seatpost
Solution(s)