Iatkos L2 shut down issue

[caguars]

Hi ! I have one pc with the following specs:

 

- MB Asrock p5b-de;

- 4gb ram;

- EVGA GTS450 1GB;

- hdd WD 500gb sata;

- hdd Samsung Spinpont F3 1TB;

- Asus dvd rw.

 

I'm having an instant reboot problem with my hackintosh). When I select shutdown, it will shutdown and then start up again after a couple seconds. Default L2 install with jmicron and IOPCI Family . . My Asrock mobo doesn't have this problem. Is there a kext that could help this? Thanks!