hi,

EEPROM of AT89S8252 is accessed like extended data memory; it is why you use MOVX.
Now, you have put constants into code memory segment. Well, perhaps it helps your programmer to recognize the EEPROM part of data during programming. But it is totally wrong for simulator because it does not know about that constants placed at code area at address 0x2000 and above are EEPROM data.
So please do not mix output hex/binary file format requested with programmer with memory format used with simulator.
So my suggestion: read http://www.keil.com/support/docs/2369.htm firstly and it explains you all you need.

Regards,
Oleg