this is a sample code that show the problem.
copy and paste this code to see the problem.
this code dosen't need any external file.

///////////////////////////////
#include <acknex.h>
#include <default.c>
#include <mtlFX.c>
#include <ackphysx.h>

action l1_func()
{
pXent_settype(my,PH_STATIC,PH_POLY);
pXent_settriggerflag(my, NX_TRIGGER_ENABLE, 1);
wait(-1);
ent_remove(me);
}

function main()
{
physX_open();
level_load("");
wait(2);
ent_create(CUBE_MDL,NULL,l1_func);
}