Can someone really help me to solve this. My CNC lathe had once executed a G33/G32 Threading cycle. Suddenly, whenever I run a Threading Cycle, it just reads the line of the threading cycle on the screen and stays there with spindle rotating but no tool motion. Below is a program I used to test the Lathe once more:

%
G28 U0 W0;
T202;
G00 X20.0 Z5.0;
G76 P030060 Q100 R0.15;
G76 X16.93 Z-30.0 P1533 Q500 F3.0;
G28 U0 W0;
M05;
M30;
%
Please, what could be the problem?