Thanks. Yes your code is works but i don't want to use trigger action. Try this code:

Code:
#include <acknex.h>
#include <default.c>
#include <ackphysX3.h>

#define PRAGMA_PATH "C:\\Program Files\\GStudio8\\templates\\sounds";
#define PRAGMA_PATH "C:\Program Files\\GStudio8\templates\models";

#define PRAGMA_PATH "C:\\Program Files (x86)\\GStudio8\\templates\\sounds";
#define PRAGMA_PATH "C:\\Program Files (x86)\\GStudio8\\templates\\models";

SOUND *snd_impact = "aiimpact.wav";

ENTITY* terrain_ent;


// Impact event : 
void impact_event()
{
	if (event_type == EVENT_FRICTION)
	{
		ent_playsound ( my, snd_impact,100);
	}

}


// App entry point
void main()
{
	// Open physX : 
	physX3_open();
	
	// Load level : 
	level_load("");
	vec_set(camera.x, vector(-253, -6, 128));
	camera.tilt = -26;
	
	// Create cube : 
	terrain_ent = ent_create("water.hmp", vector(0, 0, 0), NULL);
	pX3ent_settype(terrain_ent, PH_STATIC, PH_TERRAIN);
	
}

VECTOR p_target;
VECTOR kick_vec;
void on_space_event()
{
	p_target.x=camera.x+cos(camera.pan)*cos(camera.tilt)*50;
	p_target.y=camera.y+sin(camera.pan)*cos(camera.tilt)*50;
	p_target.z=camera.z+sin(camera.tilt)*50;
	
	you=ent_create(CUBE_MDL, p_target.x, NULL);
	pX3ent_settype(you, PH_RIGID, PH_BOX);
	you.emask|=(ENABLE_FRICTION);
	pX3ent_setcollisionflag(you, NULL,PX_PF_NOTIFY_TOUCH);
	
	kick_vec.x=100;
	kick_vec.y=0;
	kick_vec.z=0;
	vec_rotate(kick_vec,camera.pan);
	pX3ent_addvelcentral(you, vector(kick_vec.x, kick_vec.y, kick_vec.z));
	you.event=impact_event;
	
}



it only works in the previous version. (0.85.0)