My first suggestion is that you submit a support ticket. Depending on how busy we are it could take a while for someone to get back to you. There may be some sort of unique situation with your server that is causing this to not work properly.
Here are a couple things that may help get this working....
Since you are not testing locally - copy the setting you have for remoteRoot to the localRoot setting.
$WAGLOBAL_localRoot = "/PowerCMS/";
$WAGLOBAL_remoteRoot = "/PowerCMS/";
PowerCMS does a check to see if it is being used locally or remotely, but if nothing is specified in the localRoot setting, it assumes it is being tested locally and uses the root of the site.
Also, make sure the images and swf directories exist on the server.