read itab error

Hello all,

i m coding this......

loop at itab2.

READ TABLE itab1 with KEY X = 'itab2-X'.

if sy-subrc= 0.

process.

endif.

endloop.

But here itab1-X shows no data in debug but there is data in itab2-X.

so no wrong result.

can u tell me why table itab1 is not reading here .

Thanks a lot.