Image position don't work

Hello,
I use psychopy 2023.2.3 and i would like to display an image on a specific position but i failed.
My code:

path_to_image_file = "images/tuto_HA (1).jpg"
image_stim = visual.ImageStim(win, image=path_to_image_file)
image_stim.pos=(1,0.5)
image_stim.draw()
win.flip()
event.waitKeys()  # press space to continue
win.close()
core.quit()

When i change the position of my image with the image_stim.pos function, the position of the image is don’t modified!
Any idea ?
Thanks