Question: problems with display function

I have just upgraded from Maple 12 to Maple 14.  I opened an old file (Maple 12 format) and when I tried to use display to replot the data - there were capital letters where the fit line should be and the axes were also strange.  Is anyone else having this problem and what should I do about it.  Below is a copy of my info:

with(plots);
[animate, animate3d, animatecurve, arrow, changecoords, 

  complexplot, complexplot3d, conformal, conformal3d, 

  contourplot, contourplot3d, coordplot, coordplot3d, 

  densityplot, display, dualaxisplot, fieldplot, fieldplot3d, 

  gradplot, gradplot3d, implicitplot, implicitplot3d, inequal, 

  interactive, interactiveparams, intersectplot, listcontplot, 

  listcontplot3d, listdensityplot, listplot, listplot3d, 

  loglogplot, logplot, matrixplot, multiple, odeplot, pareto, 

  plotcompare, pointplot, pointplot3d, polarplot, polygonplot, 

  polygonplot3d, polyhedra_supported, polyhedraplot, rootlocus, 

  semilogplot, setcolors, setoptions, setoptions3d, spacecurve, 

  sparsematrixplot, surfdata, textplot, textplot3d, tubeplot]
homo_data:= [[0.07143, -5.27798], [0.03571, -5.09811],[0.02381, -5.04314], [0.01786,-4.95879]];
[[0.07143, -5.27798], [0.03571, -5.09811], [0.02381, -5.04314], 

  [0.01786, -4.95879]]
lumo_data:= [[0.07143, -2.0953], [0.03571, -2.52144],[0.02381, -2.62239], [0.01786,-2.79138]];
[[0.07143, -2.0953], [0.03571, -2.52144], [0.02381, -2.62239], 

  [0.01786, -2.79138]]
homo_eqn:= -12.94151*sqrt(1-0.85175*cos(Pi/(N+1)));

                                              (1/2)
                      /               / Pi  \\     
            -12.94151 |1 - 0.85175 cos|-----||     
                      \               \N + 1//     
eval(homo_eqn, N=infinity);
                          -4.982901512

lumo_eqn:=homo_eqn+15.90268*sqrt(1-0.98083*cos(Pi/(N+1)));
                                            (1/2)
                    /               / Pi  \\     
          -12.94151 |1 - 0.85175 cos|-----||     
                    \               \N + 1//     

                                                (1/2)
                        /               / Pi  \\     
             + 15.90268 |1 - 0.98083 cos|-----||     
                        \               \N + 1//     
gap_data:=[[0.07143, 2.9816], [0.03571, 2.3132],[0.02381, 2.1291], [0.01786, 2.0525]];
   [[0.07143, 2.9816], [0.03571, 2.3132], [0.02381, 2.1291], 

     [0.01786, 2.0525]]
display([pointplot(homo_data),pointplot(lumo_data),plot([[1/N,homo_eqn(N),N=14..10000],[1/N,lumo_eqn(N),N=14..10000]], labels = ["1/N","E in eV"])]);


   +                                                                  BBBBBH  
   +                                                       BBBBBBBBBBB        
   +                                           BBBBBBBBBBBB                   
-2.5                              BBBBBHBBBBBBBB                              
   +       BBBBBBBBBBBBBBBBHBBBBBB                                            
   *BBBBBBBB         H                                                        
 -3+                                                                          
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-3.5                                                                          
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 -4+                                                                          
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-4.5                                                                          
   +                                                                          
   +                                                                          
 -5*AAAAAAAAAAAAAAAAAHAAAAAHAAAAAAAAA                                         
   +                                 AAHAAAAAAAAAAAAAAAAAAAAAAAAA             
  -+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-***********- 
   0       0.01      0.02      0.03      0.04      0.05      0.06      0.07   

 Any help would be greatly appreciated!