>I put a checkbox in the column of a grid, which is held on a page frame. when I enter the page which holds the grid for the first time, everything looks ok. if I switch pages to another page, and then go back to the grid page, it has lost the check box and displays the value on the table "1" or "0".
>
>Your help would be much appreciated.

Robert,
Make sure column's currentcontrol is set to your checkbox and sparse = .f.
Cetin