If your screen is defined as 71 rows when you put something in row 75 it will have wrapped back to the top and may be under another label on the screen. If you want to put something in row 75 the screen should be defined as having at least 75 rows.
Also did you remember to set the width and height correctly? If you screen is defined as 100 columns and you put something in column 1 with a width of one it will be on the screen but since it only is in column one it won't show. Objects do not automatically extend over multiple columns.
--Bill