How to calculate correlation coefficient between three dimensional matrix ?

Hello,

I have two gridded matrix, matrix1 and matrix2 having latitude, longitude and months (180 x 360 x 12). I have calculated correlation coefficient and p-value between both matrices using corrcoeff function. Than I assigned three values in correlation matrix, 1 for positive correlation (p-value is <0.05), -1 for negative correlation (p-value is <0.05) and 0 for rest of the positive/negative correlation which have insignificant (>0.05) p-value. I wrote following code for correlation coefficient calculation:

for y = 1:180,
  for x = 1:360,
       A = matrix1(y,x,:);
          B = matrix2(y,x,:);
          [C,P] = corrcoef(A,B);
      m = C(1,2);
  n = P(1,2);
map1(y,x) = m;
pval(y,x) = n;
   if map1 > 0 & pval <= 0.05;
            cormap(y,x) = 1;
         elseif map1 < 0 & pval <= 0.05;
            cormap(y,x) = -1;
         else
            cormap(y,x) = 0;
         end;
  end;
end;

basically I want want to find significant and insignificant correlation values in correlation matrix. But using above code final output cormap is showing 0 value in entire matrix. I am not getting where I am wrong. Can anyone help me to solve this problem ?