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I need to write a program : which will read in string and determine if character string is palindrome.

I came up with this code(pasted below) , but there is logic fault.
Please help me with this .



output prompt1 ; ask for string as input
input old,32

lea esi,old
lea edi,new


check_process: mov al,[esi]
mov [edi],al
cmp [esi],[edi]
je dojob
jne message ;message ,string is not palindrome

dojob: inc esi
dec edi
jmp check_process