New to Miktex

Manik Don <[email protected]>
Newsgroups gmane.comp.tex.miktex
Message-ID <[email protected]>
Hi all
I am new to Miktex
 
I am trying to include a png image (or jpeg image) into a miktex document.
 
I included the following line 
 
\includegraphics[width=40mm]{png1}
 
and also I have included the 
\usepackage{graphicx}   to the top of the file
 
but the output is showing just a blank box with the text "png1.png"
 
** png1.png is my png image name and it is in the current folder.
 
Will someone please teach me what is wrong.
I am sorry this may be a baby level question.
Best regards
Manik
 
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