There are a number of reasons why the extension may not be able to create the table automatically. Most likely would be a permissions issue.
the extension will save the table settings to a SQL file that you can use to create the table manually, see this tutorial for details:
http://www.webassist.com/tutorials/Import-a-sql-file
as for the server address being localhost: maybe, maybe not, depends on the hot. If you are not sure, you should contact them.