Okay guys- first make sure you are running the latest version of RP. You can get it here:
http://www.omnicia.com/Zencart%20Rew...s%20Module.zip
If you are still having issues, download and run RPD. Just copy the files from:
www.omnicia.com/rpd.zip
Then extract them to your root folder on your website and enter
http://YOUR STORE WEB ADDRESS/rpd.php on your browser. Check for any lines highlighted in red.
If you are still having problems then you need to tell me what other mods you have loaded (plus give me a URL). After that if you would like me to check out your site, then PM me with temporary access details (Admin and FTP) if you are happy to do that- And I'll check the site personally.