i have a grid, and i want a navigation up and down the lines by keyboard.
i only works, when i first click a line by mouse-click.
after render i use the select-method on the selectionModel to select the first line. this works, the line is selected, but i can't navigate with keyboard, and i didn't found another method that helps.

has sombody an idea, or a solution? or is it a bug?

i use extjs4

thanks a lot