If you're trying to enter the results via FileMan, make sure that you have the Report Text, Impression, and Result Status (Draft, Problem Draft, Verified) populated as well as Interpreting Staff. I'm not sure which fields those are in the ^RARPT global, but I am pretty sure you cannot view a report that is in a non-verified status.
Optionally, just use the Films Reporting Menu in the Radiology Package. (RA OVERALL -> Films Reporting Menu -> Enter/Edit Report). Sorry, I don't know the option names for the last two off the top of my head).