This is my zombie's C_move:

c_move(my,vector(5*time,0,0),nullvector,ignore_passable + glide);

This is my player's:

move_vec[0] = (key_cuu - key_cud)*25 * time + (key_v * 10) * key_cuu * time;
player.pan += (key_cul-key_cur)*8 *time;
move_mode=IGNORE_PASSABLE+ GLIDE;
ent_move(move_vec,vector(0,0,0));

The player moves when you press the UP and Down key. If you press Up and V together it runs. I hope the problem comes from these codes and not from anything else...

I think to solve this problem I should use a kind of trick.

I don't care!