Site search only works on homepage

Hello and thank you so much in advance.

Allow me to explain my issue:

On this site http://ift.tt/21KGyWT if you scroll to the middle of the page and look on the right sidebar you will see a field titled, "Search VA OSDBU" and when I search it brings up results, great.

Now for the issue, this site search appears on every page of the web site however if I'm on another page, let's say this one, http://ift.tt/1EYOtVA, and I try to search for something the result is a page not found.

How can I make it work on every page? Do I need to change something in the form action?

Thank you in advance to the brilliant minds on this forum!!