Has ent_animate changed? I am having problem with a very simple piece of code....

it does not animate even with tried and true models like the warlock...

var anim_cycle;

action guss()
{

player = my;
set(my,SHADOW);
my.material = mat_alphatest;

while(1)
{

ent_animate(my,"run",anim_cycle,ANM_CYCLE);
anim_cycle += 5 * time_step;
anim_cycle %= 100;

my.pan -= mouse_force.x + mouse_force.x;

wait(1);
}
}

..this is very simple, but does not work???? what am I missing?