CKEditor: Plugin Button is shown but the command is not working
<p>first of all, thank you for your support.</p>

<p>I've tried to create my first plugin for CKEditor.
I used the official Tutorial: <a href="http://docs.ckeditor.com/#!/guide/plugin_sdk_sample" rel="nofollow">http://docs.ckeditor.com/#!/guide/plugin_sdk_sample</a></p>

<p>The Button appears in the Toolbar. But if I click on this, nothing happens.</p>

<p>Here is my Code of plugin.js</p>

<pre><code>CKEDITOR.plugins.add( 'drmail', {
    icons: 'drmail',
    init: function( editor ) {
        editor.addCommand( 'drmailCommand', {
            exec: function( editor ) {
                var now = new Date();
                editor.insertHtml( 'The current date and time is: &lt;em&gt;' + now.toString() + '&lt;/em&gt;' );
            }
        });
        editor.ui.addButton( 'DRmail', {
            label: "E-Mail Adresse hinzufügen",
            command: 'drmailCommand',
            toolbar: 'insert'
        });
    }
});
</code></pre>