How do you tell what version of Joomla you are using?
Simply log into the administrator area of Joomla and look either top right on bottom middle of the page. Where it will be displayed in the formate similar to 1.5.22 or 2.5.11.
If it reads 1.5.XX where XX is any number - your version of Joomla is outdated and you really need to consider upgrading to improve security. Contact us now to discuss.