I've discovered that the site I am administering, when viewed with IE, gets the message "Do you want to view only the webpage content that was delivered securely"

This error comes up when logging in and when checking out.

I used HTTPWatch to find out what files were causing the error:
Code:
+ 0.000		0.587	725	75030	GET	200	text/html; charset=iso-8859-1	https://gator1034.hostgator.com/~ginabmx/store/index.php?main_page=login&zenid=8ba8332af224eb21d89af07da65785d5
+ 0.248		0.001	0	0	GET	(Cache)	text/css	http://pbpbikes.com/store/includes/templates/12541/css/style_imagehover.css
+ 0.349		0.001	0	0	GET	(Cache)	text/css	http://pbpbikes.com/store/includes/templates/12541/css/stylesheet.css
+ 0.351		0.001	0	0	GET	(Cache)	text/css	http://pbpbikes.com/store/includes/templates/12541/css/stylesheet_boxes.css
+ 0.352		0.001	0	0	GET	(Cache)	text/css	http://pbpbikes.com/store/includes/templates/12541/css/stylesheet_css_buttons.css
+ 0.353		0.001	0	0	GET	(Cache)	text/css	http://pbpbikes.com/store/includes/templates/12541/css/stylesheet_main.css
+ 0.354		0.001	0	0	GET	(Cache)	text/css	http://pbpbikes.com/store/includes/templates/12541/css/stylesheet_tm.css
+ 0.355		0.001	0	0	GET	(Cache)	text/css	http://pbpbikes.com/store/includes/templates/12541/css/print_stylesheet.css
+ 0.356		0.001	0	0	GET	(Cache)	application/javascript	http://pbpbikes.com/store/includes/templates/12541/jscript/jscript_imagehover.js
+ 4.350		0.135	401	1452	GET	404	text/html	http://pbpbikes.com/store/includes/templates/12541/images/bg2.gif
+ 4.351		0.001	0	0	GET	(Cache)	application/javascript	http://pbpbikes.com/store/includes/templates/template_default/jscript/treemenu.js
+ 4.356		0.001	0	0	GET	(Cache)	application/javascript	http://pbpbikes.com/store/includes/templates/template_default/jscript/treemenu_tpl.js
+ 4.376		0.004	0	0	GET	(Cache)	image/jpeg	http://pbpbikes.com/store/includes/templates/12541/images/bg_banner.jpg
How do I get the CSS files to be included to be retrieved via https:// during login? Also the javascript files and the img?

Also, I am using a downloaded template.

Thanks