My PHP script does not work....

[nic]

Good day to all!
I have just sing-up for a free account.
I have uploaded a home page, index.html and it works great except for the submit button.
But when I uploaded a php script it says, <Access to this resource on the server is denied!>.
Do I need to install or configure PHP on my newly made site?
Please help.
Thank you so much for reading.

This is my site: http://cets.x10.mx/
I uploaded a hello world php script: http://cets.x10.mx/try.php

 

[Skizzerz]

Your permissions are wrong. As a security precaution, we prevent you from running any PHP script that is marked as group-writable or world-writable or that is located in a directory marked as group-writable or world-writable. As a general rule of thumb, all of your files should have their permissions set to either 644 (rw-r--r--) or 600 (rw-------) and all of your directories should have their permissions set to 755 (rwxr-xr-x) or 700 (rwx------).