sort

hi experts

i have done sorting as follows, but its not working properly.

sort ipos by kda pos udate UTIME descending.

loop at it_final.

read table ipos with key kda = it_final-kdauf pos = it_final-kdpos.

if sy-subrc = 0.

it_final-budat = ipos-udate.

55002964 10 20070907 124549

55002964 20 20070907 124519

55002964 20 20070907 112943

what could be the reason, how to solve this issue.

Thanks in advance.

Regards

Rajaram