Alica, I had the same problem the other day while mounting my 50mm 1.8D lens. Kept getting the FEE code. Once I rotated the aperture ring a couple times and locked it at f22, my issues went away and I was able to use the lens.
You've been given solid advice here. Based on the situation you've described, it would most likely indicate an issue with the lens and not the camera body itself.
I hope you resolve your issues with minimal effort and cost.