fuses atmega168


I want to make an arduino with an ATmega168. But I think I failed, because my atmega won't react.

I wrote this code to my atmega
avrdude -p m168 -P com3 -b 19200 -c avrisp -U lfuse:w:0xf8:m -U hfuse:w:0xdf:m
because of this page: Arduino Playground - HomePage
"set the fuses should read 0xF8, 0xDF and 0xFF"
So I send this fuses to my µC.
but this page said:
that the fuses are "0xDD and 0xFF"

So I'm a little confused, can I reprogram my µC. What oscillator should I use?

The same happened to another µC I wrote highfuse 0xCA lowfuse 0xDF

I use windows vista, mega-isp (programmer), avrdude, ATmega 168

Does this help or add confusion...