assuming fields show up in layout-mode with black font-color and the layout has a data-part
- fonts? Try another font
- wrong sort when using a report-layout?
- conditional formatting?
- the fields are inside the 'viewable' area (FM13) ?
Perhaps "Show All Records" needs to be used so that you don't have a found set of 0 records?
Note that we are posting guesses here as we have very little info from which to work.