windows phone 8 - Error::Plugin not allowed in config.xml - Cordova/Phonegap -

windows phone 8 - Error::Plugin not allowed in config.xml - Cordova/Phonegap -

i trying create first plugin in wp8, getting error

plugin not allowed in config.xml.

what doing wrong?

in config.xml

<feature name="echo"> <param name="wp-package" value="com.example.echo.plugins.echo"/> </feature>

in echo.js

window.echo = function (str, callback) { cordova.exec(callback, function (err) { callback('nothing echo.'); }, "com.example.echo.plugins.echo", "echo", [str]); };

in echo.cs

using wpcordovaclasslib.cordova; using wpcordovaclasslib.cordova.commands; using wpcordovaclasslib.cordova.json; namespace com.example.echo.plugins { class echo : basecommand { public void echo(string options) { ...

in echo.js

only class name has called , not total package. below:

window.echo = function (str, callback) { cordova.exec(callback, function (err) { callback('nothing echo.'); }, "echo", "echo", [str]); };

cordova windows-phone-8 phonegap-plugins