I know that this question has been asked before but I can't seem to fix my error pages.

I am currently working on a website is on a vhost (not that I could get a non-vhost php error message working). Any page or folder that doesn't have the .php extension displays my custom error page, but if it is a .php file I just see a blank page.

My nginx.conf and the vhost that I am working on are here:
(-) nginx.conf - http://pastebin.com/raw.php?i=fz5xRkTH
(-) my vhost - http://pastebin.com/raw.php?i=uxTUiPM0

Thanks in advance
Humza