There might be a difference in timezone settings between your test users and the server. Not sure if cPanel has a setting for that. .htaccess is normally a hidden file so you may have to find a show-hidden files setting depending on how you're viewing your servers directory. Some web hosts only provide one .htaccess for your parent domain and others will support a master as well as a custom one inside each sub-domain. You may have to search your server root for yours.

On a side note, you're probably going to get way better statistical data using google analytics. It's extremely simple to setup and implement. They even have a flash api if your interested in tracking things that happen within your swf (although you have to track those manually)