I am trying to access this file via URL on my server and it gives me the 403 forbidden error. I've checked the permissions of the directory containing the file and the file itself and changed them both to 755. Still, I am unable to change it. I don't know what could be wrong with it. I'm simply editing a site someone else originally created, so I imagine its some setting they've created but I don't even know where to begin to look. Any help would be greatly appreciated. Thanks in advanced.
The issue was the web developer before me enabled Hotlink Protection and blocked '.pngs' from being directly accessed. Thank you for the help.