having prob. with atlantis 3 game

i have loaded the game (atlantis 3-the new world-) but when i start to play it freezes on me. sometimes at the first scene(first click) other times in the second or third and i am not able to do anything but reboot the system.
My system :
Intel Celeron 1.7Ghz, 256 MB DDR, Mtasonic MS9367E mainboard,GForce 2MX 64MB, Direct X 9.0, Maxtor 60GB HD.