Figures (pdf) do not contain any text in the final document [closed]

I am creating some plots in Matlab and saving them as pdf files. When I include these pdf files in latex (i am using MikTex and pdflatex) using \includegraphics, all text from plots (legends, xlabel, etc) does not show up in the final document. The exported pdf from matlab contain the text.

Does anyone know what could be the problem and how can I fix it ?

Edit (geometrikal):

Here is an example of a file with the problem: https://dl.dropboxusercontent.com/u/8184720/recon_rmse.pdf

I am using texstudio, with the buit in viewer (dvipng) and building with pdflatex. In the viewer it shows: