If you see the error below, or find that attributes are missing that you expect on the installation (and are not found under the Attributes section in admin) it is likely that the extension SQL installation script has not run.
This error results from a race condition in Magento, where the code is unable to pick up the sql file when attempting to install. We only see this on <1% of installations, but when it happens it is not easy to resolve. We apologise for this, and are working with Magento to make the installation side more solid so this problem doesnt occur.
Take the following steps to resolve the issue. We assume here you are competent with phpmyadmin, if not then get a developer who is to assist, as doing this wrong can break your magento installation.
Alternatively, we have a script which allows you to delete the core_resource table. Please note, you will need the latest WSA Common installed for the script to run successfully. It is recommended that you contact WebShopApps to get the latest version of WSA Common and that you install it onto your site before running this script.
Disclaimer - Do not use this script unless you are confident that you know what you are doing. WebShopApps cannot be held responsible for the outcomes of using this script.