atmega 328p at 20 Mhz and usb programmer

Development Boards MicroMod
1

Hi,

I bought the avr programmer available on sparkfun shop :

http://www.sparkfun.com/products/9825

I installed an external quartz (20 MHz) and update lfuse low bits with avrdude (I followed these instructions : http://www.instructables.com/id/Build-a … n-the-AVR/ )

But now, I can’t access to my atmega328p with avrdude…

Can my avr programmer communicate with atmega328p at 20 MHz ?

If not, How can I rollback ?