OK guys, the problem have been solved.
In fact the problem was more complicated because I use also an external SRAM that mapped to same address as internal EEPROM and accessing them is made by XDATA. So, when I enabled the internal EEPROM I actually copy from EEPROM to EEPROM and not from EEPROM to SRAM and vice-versa.
So as I said, it’s working now. By making some changes to the original code I sent before and with the help of Mr. Keil we solve the problem and now it’s working!

P.S.
No need to write 3 times.

Have a nice day and thank you all,
Roberto