Content not being displayed after get_header

Hi All,

Having a go at creating my own theme. However when I test it only the header information is being displayed.

I have the header.php footer.php sidebar.php and index.php files all of which have been filled in.

The contents of the index.php file is as follows:

<?php get_header(); ?>

<?php get_siderbar(); ?>

<?php get_footer(); ?>

However, when I visit my site it only shows the contents of the header. If I view the source then only the code for the header is shown.

Any advice would be appreciated.