Cant get manual auto leveling to work

hello everyone...

so i received anet a8 printer a couple of days ago and now i've put marlin on it. so far so good. except that manual auto leveling feature will not work because Z offset will not go into negative once it hits Z endstop trigger.

i tried commenting this out

// Min software endstops constrain movement within minimum coordinate bounds
//#define MIN_SOFTWARE_ENDSTOPS
//#if ENABLED(MIN_SOFTWARE_ENDSTOPS)
//  #define MIN_SOFTWARE_ENDSTOP_X
//  #define MIN_SOFTWARE_ENDSTOP_Y
//  #define MIN_SOFTWARE_ENDSTOP_Z
//#endif

and i tried sending pronterface commands like this:

>>> M211 S0
SENDING:M211 S0
echo: Soft endstops: Off  Min: X-33.00 Y-10.00 Z0.00  Max: X220.00 Y220.00 Z240.00
echo:enqueueing "G28"
echo:enqueueing "G29 V1"
G29 Auto Bed Leveling
Manual G29 point 1 of 9
echo:endstops hit:  Z:-0.05

and you can see it hits endpoint and it wont move anymore down so i have to tediously level the bed the old fashioned way with turning screws... and i hate it lol... takes a lot of time