AT89c51 interfacing problem

hello all,
I m using AT89c51 controller.my application icludes reading & writting a 16 bit data into 93c46 eeprom memory using this controller. i've written the code in C. but i m unable to write the data into memory.
I've tried all the options but still it is not working
Are there any hardware modifications i've to do?
Plz reply,thanx

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