Remove STATEMENTS section in install.xml file, use db/install.php or db/log.php instead.
How can I edit the install.php?
install.php defines a function which is executed after your plugin's tables are created.
Take a look at an existing plugin's install.php file for an example, the assignement plugin has a simple one
You'll need to replace assignment in the function's name with your plugin's component/frankenstyle name.
OK ,thank you.