site crashes on ipad

After a week try and search, I am satisfied with my travel site.( )
My posts go by categories to menu items (see Frankrijk-Cote d’Azure 2013).
To see my posts full I have changed content-extensions-php: line 133, that says < ?php the_excerpt(); ?>
Now replace it with < ?php the_content(); ?>. and remove read more button code from line 151-153 which is related to “Read more button”…

But: When I go to settings - read more than 3 posts (default 10) the site crashes on IPAD.(works fine on PC)
A big disappointment. Like help!