It shows the permalink as "http://rmgfund.com/security"If you change the permalink setting and then edit your Security Page, what does it show for the Permalink just under the Title?
The link did need to be updated, but this isn't the problem. I can type the page URL into my browser, and the page can't be found. The problems is that the page has errors with pretty permalinks, or http://rmgfund.com/security. It only works with the default permalinks, or http://rmgfund.com/?page_id=169.If it shows the correct Permalink, then you need to edit the link that you are clicking to get to the Page.
The real issue seems to be Windows hosting. I've tried several fixes and workarounds, but no luck so far.