question about working with PHP files

I’ve got a question about working with PHP & MODx. I wasn’t quite sure where to post this... I apologize if I’ve posted in the wrong section.

I’ve got a snippet with this in it:

<?php require_once(’calendar/quick_calendar.php’); ?>

Initially, the snippet works fine, but when I make changes to the quick_calendar.php file, the changes aren’t being
reflected as I would expect. In fact, I tried deleting the quick_calendar.php file from the server, reloaded the site, and the site still functions as if the quick_calendar.php file was still present. I’ve never experienced this before and I don’t understand why it’s happening.

My question is this: does this sound like some sort of server-side caching problem? Is that even a possibility? If so, do you know if there’s anything I can do within MODx (settings, etc.) to fix it? Or might there be a setting I can change in Plesk?

Thanks for any help you might be able to provide.

Also, I can give these details if needed:

http://modxcms.com/forums/index.php/topic,489.0.html

I just thought that my question might be a general question and might not need all the specifics in order to be answered.

Are you calling it like [!mysnippet!] or [[mysnippet]]? The former is the method that will call your snippet uncached.

Ah ha! Beautiful! That works perfectly!

Thank you for your help.