First upgrade your joomla to 1.5.6. Security is a factor of your joomla installation and the tools you have employed to secure it - not the RT template. I suggest that you install something like akeeba admin tools pro to better secure your site or rs firewall. Make your passwords very long and random characters.
Regards, Mark.
Please search forums before posting. Please make sure your post includes the version of the CMS you are using and a link to the problem. Annotations on screenshots can also be helpful to explain problems/goals. Please use the "secure" tab for confidential information.