Get Cursor

In the basic list I put this code and it's returning me wrong values in the First Detail List .

select kunnr
       name1
       land1
       from kna1 into table itab.

loop at itab.
  write:/10 itab-kunnr,
         35  itab-name1,
         70  itab-land1.
         get cursor field itab-kunnr.
  hide itab-kunnr.