I created a custom application page which is deployed to the web applications section in central admin, following this guide:

http://msdn.microsoft.com/en-us/library/ff798467.aspx

I am a farm administrator. I have access to everything in central admin, but when I try to access my custom page, I get the "Access Denied" error page. I have no idea why it is doing this.  It works on my local machine, but when I deploy to my company's staging environment, I get access denied. SharePoint 2010 by the way.

Any ideas?