Why is PCA returning only one component when I have 50 variables?

I am trying to use PCA in Matlab 2013. I have 50 variables with 52 observations for each. In the example given in documentation there is a component (as I understand each column of coefficients is a component) for each variable. When I do (coeffs, scores)=pca(data) I only get one column of coefficients with 52 rows. Can anyone explain what I am doing wrong please? Thanks!