Quote Originally Posted by ikselsis View Post
my problem is 100khz , 400khz and 1mhz eeprom, I read and write 100khz eeprom with 18f4620 , I'm not read and write 400khz and 1 mhz eeprom
Well, again, can't see any code, so really can't tell if something else is messing with your eeprom.
What value pullups do you have on clock and data?