AVR-Chat

Hello Friends
              I am newbee in AVR's. I started AVR 2 months back. 
However setting fuse bit for clok setting is still problem for me. I 
already burn 7 avr trying to set it for 8MHz cystal.I am using Pony 
Prog software to program AVR and ISP similar to one available on Pony 
Prog website. I am using Assembly language for programming on AVR 
Studio interface. I am using Fuse and Lock bit tool of Pony prog 
software to write by bits on the controller.Initial setting was 
BOOTSZ1,BOOTSZ2,SUT0,CKSEL3,CKSEL2,CKSEL1 ALL THESE CHECKED.
WHAT I DID WAS BOOTSZ1,BOOTSZ2,SUT0,CKSEL3 CHECKED .Thanks in advance 
for your support.