Hey, sorry for the late reply.
I managed to get a new motherboard (P5AD2 Premium), just like my old name. The problem persists...I've found out that it will only auto-start if the router is connected to te computer.
The odd thing is that this same router, with a similar motherboard (my neighboor), doesn't make his pc auto-start.
I've emailed asus, but haven't got a reply yet.
Any ideas :S ?
Tamadite, I might try that thanks for the suggestion!