how to start xbanking on 8051

Thank you

i interface 8032 microcontroller with external memory 64KB. at now i increase external memory to 128 KB so i using xbanking but it does not work.
i allocate 18000 to 1ffff as HDATA but it gives error.
In keil example program using far memory it enough to increase 64kb to 128 kb

Thank you

i interface 8032 microcontroller with external memory 64KB. at now i increase external memory to 128 KB so i using xbanking but it does not work.
i allocate 18000 to 1ffff as HDATA but it gives error.
In keil example program using far memory it enough to increase 64kb to 128 kb