Does not working on IE

are there any javascript errors being thrown in the console?
does the page that is not printing print some times, and some times not, or does it NEVER print?

It looks like you have another plugin causing a javascript error that is preventing print-o-matic from doing it’s thing on that page. You really need to get that issue resolved, more on that below. In the meantime, you might try having print-o-matic load it’s scripts in the header, rather than the footer (default). This can be done in the options page for print-o-matic under:
Dashboard > Settings > Print-O-Matic

OK, here is one major error. On the page that has no errors, the following code exists:

<script type="text/javascript">
			var curr = 635;
			$('#sidebar li.' + curr).css("display","none");
</script>

However, on the page with errors, the same script looks like:

<script type="text/javascript">
			var curr = ;
			$('#sidebar li.' + curr).css("display","none");
</script>

do you see that var curr = ; part? no good! You will want to have someone with a bit of technical skills trouble shoot if this is coming from your theme, or another plugin.

Now here comes a shameless plug…
<shameless_plug>
Our pro version: Print-Pro-Matic will not magically solve this, but it does come with some next-level Jedi style support (hint-hint).
</shameless_plug>

Best of luck, and please let us know if you figure out what was causing the issue!

We just checked and the javascript error with that script is still on your page:
http://104.200.19.20/?p=630

You will need to get this issue resolved, as it is breaking all javascript functions on your page.

OK. so that issue is fixed. Now the next one:
You have multiple version of jQuery being loaded on your page:
First there is an old version (v1.10.2) being force-loaded by your theme:

<script type="text/javascript" src="http://trendsinstitution.org/wp-content/themes/trends/js/jquery.min.js"></script>

Then, there is the current version being loaded in the correct way by WordPress:

<script type='text/javascript' src='http://trendsinstitution.org/wp-includes/js/jquery/jquery.js?ver=1.11.1'></script>

Finally some plugin or your theme is also loading a very old version (v1.8.3) from google

Sorry, but there is just too much going on with your site to trouble shoot in this manner. We highly recommend you have someone work with you to remove all the javascript errors on your site.

any joy?