File available but giving 404 in wordpress

Hey,
im not sure why but php files other then wordpress either redirects to homepage or gives a 404.
for example i have a timthumb.php in directory /js/

it was working fine and generating thumnails for me.. but it started to give 404 on even running the direct url.

You can take a look here : www.designzzz.com/js/ you will see timthumb.php available, but on clicking or running that file it gives 404 🙁 .

Help is appreciated 🙂

cheers

Ayaz

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