select is not working!!!!!!!!!!

hi,

my internal table is

data : begin of i_bkpf occurs 0,

xblnr like bkpf-xblnr,

end of i_bkpf.

and my select statement is

select xblnr into table i_bkpf

from bkpf

where blart = p_blart.

loop at i_bkpf.

write : / i_bkpf-xblnr.

endloop.

now there is no output for this statement...there is data int he table against blart inthe table..can anyone correct me ...

thankyou..