Problem with global settings for plugin not being persisted after Jenkins restart

[da3v]

I'm trying to write a plugin that relies on persisted global config values, but they are being reset every time Jenkins is restarted.

Using the HelloWorldBuilder as an example:

mvn hpi:run

Jenkins->Manage Jenkins->Configure

check the "French" checkbox under "Hello World Builder"

Click "Apply"

Click "Save"

Do a build using the plugin, and output is in French ("Bonjour, <name>")

Restart Jenkins (either via control-c, mvn hpi:run, or via the manage plugins restart button)

Do a build using the plugin, and output is in English ("Hello, <name>")

In the plugin's global config file, the checked value is still set to true

<hellopersist.HelloWorldBuilder_-DescriptorImpl>

  <helpRedirect/>

  <useFrench>true</useFrench>

</hellopersist.HelloWorldBuilder_-DescriptorImpl>

So it appears that the global config file for the plugin is not being reloaded after a restart.  Could someone point me to an example of how to address this?

Thanks,

-Dave