Why are my axes-objects non-existent?

Hello,

I'm working on a programm to load a image in one axes-object and make a affine transformation of this one, then save the transformation in a second axes. The axes-objects are squares of the same size. Afterwards i register the (previously given) transformation parameters by clicking 3 points in both pictures and calculationg them. After all that, when i press the mousebutton and "draw" in the first axes (original bild) my drawing should be transformed and drawn in the transformed image as well. But when I want to draw in the first axes i get an error:

Error while evaluating figure WindowButtonMotionFcn

Reference to non-existent field 'axes1'.

Error in Aufgabe2_neu>figure1_WindowButtonMotionFcn (line 178) plot(handles.axes1, mouse(1,1), mouse(1,2), 'r-');

I'll give you some of my code that i think is relevant:

if true
  % code
function axes1_CreateFcn(hObject, eventdata, handles)
global C;
global a1Pos;
%global ha1;
%ha1 = handles.axes1;
a1Pos = get(gca,'Position');
A = imread('beach.jpg');
C = imcrop(A, [150 150 a1Pos(3) a1Pos(4)]);
image(C);
end

-----------------------------------------------------

if true
  % code
function axes2_CreateFcn(hObject, eventdata, handles)
global C;
global a1Pos;
%global ha2;
%ha2 = handles;
a = -1+2*(28/31);
b = -1+2*(1/12);
c = -1+2*(1992/1980);
d = 1;
tx = 0;
ty = 0;
if(isempty(a1Pos))
  a1Pos = get (handles.axes1, 'Position');
end
if(isempty(C))
A = imread('beach.jpg');
C = imcrop(A, [150 150 a1Pos(3) a1Pos(4)]);
image(C);
end
abb = [a b 0; c d 0; tx ty 1];
ts = maketform('affine', abb);
D = imtransform(C,ts);
D = imcrop (D, [100 100 a1Pos(3) a1Pos(4)]);
imshow(D,'InitialMagnification',100);
end

if true
  % code
end

if true
  % code
function figure1_WindowButtonDownFcn(hObject, eventdata, handles)
global klicks;
global mouse;
global PM;
global druck;
global e;
global f;
global g;
global h;
global sx;
global sy;
global msgicon;
druck = true;
  if klicks<6
  mouse = get(gca,'currentpoint');
  hold on
  plot(mouse(1,1),mouse(1,2),'c.');
  PM(klicks+1,1) = mouse(1,1);
  PM(klicks+1,2) = mouse(1,2);
  klicks = klicks + 1;
  if klicks == 1
      h = msgbox('Klicken sie nun den entsprechenden Punkt im rechten Bild an', 'Info','custom',msgicon);
  end
  if klicks == 2
      h = msgbox('Wiederholen Sie diesen Vorgang nun noch 2 mal.', 'Info','custom',msgicon);
  end
end
if klicks==6
  M1 = [PM(1,1)-PM(3,1) PM(1,2)-PM(3,2) 0 0;
        0 0 PM(1,1)-PM(3,1) PM(1,2)-PM(3,2);
        PM(1,1)-PM(5,1) PM(1,2)-PM(5,2) 0 0;
        0 0 PM(1,1)-PM(5,1) PM(1,2)-PM(5,2)]
  M2 = [PM(2,1)-PM(4,1);PM(2,2)-PM(4,2);PM(2,1)-PM(6,1);PM(2,2)-PM(6,2)];
  efgh = M1\M2;
  e = efgh(1,1);
  f = efgh(2,1);
  g = efgh(3,1);
  h = efgh(4,1);
  sx = PM(2,1) - (e*PM(1,1)+f*PM(1,2));
  sy = PM(2,2) - (g*PM(1,1)+h*PM(1,2));
  klicks = klicks +1;
end
end

if true
  % code
function figure1_WindowButtonMotionFcn(hObject, eventdata, handles)

global klicks; global mouse; global e; global f; global g; global h; global sx; global sy; global druck; global ha1; %global ha2;

if klicks >=7 mouse = get(gca,'currentpoint'); px = e*mouse(1,1) + f*mouse(1,2) + sx; py = g*mouse(1,1) + h*mouse(1,2) + sy;

    if druck == true
        plot(mouse(1,1), mouse(1,2), 'r-');
        hold on
        plot(handles.axes2, px, py, 'b.');
    end
end
  end

I know i could leave out the handles.axes1. It will paint in that axes then but then I'll get the same error for axes2 stating that it isn't existent... Does anyone know a solution to this?

Thanks and best regards, Daniel