Maximus Formula CPU Fan Help

[Coolio_alert]

The book on my Maximus Formula motherboard tells me "If installing a dual-core CPU, connect the chassis fan cable to the CHA_FAN1 connector to ensure system stability". Now the chassis fan cable is the CPU fan right? And if so why can I not plug it in the CPU_FAN? Has anyone experienced this problem???

 

[badge]

Plug the CPU fan into the CPU fan jumper on the MB.

 

[Coolio_alert]

So why would the board tell me to plug it in elsewhere? Mabye I should ask ASUS?