Tab key does work in module pool

Dear,

Please, someone already passed or saw the following situation:

In a module pool Z, in a tab item creation (there are several columns to be filled), pressing the TAB key, the cursor is directed to the next empty field, the moment presciono the enter key or realize any screen action and I try to fill the second line, to add one more item, the TAB key does not "work" properly, where the scrollbar should follow the cursor.

I checked the characteristics of the screen.

note: I apologize to ADM insert doubt in the wrong place.

Thanks