FileOpener 2 TypeError: Cannot read property 'open' of undefined

Hi

How can i use fileopener2 plugin to open an pdf file from an url ?

I set the example from http://ngcordova.com/docs/plugins/fileOpener2/

And i do get the message: TypeError: Cannot read property ‘open’ of undefined.

I check the cordova plugin list and it is installed :
io.github.pwlin.cordova.plugins.fileopener2 1.0.11 “File Opener2”

$scope.openPDF = function(url, $cordovaFileOpener2) {
var url = "http://www.somewebservice.com/?param1=formparam1&param2=formparam2";
$cordovaFileOpener2.open(
'url', 
'application/pdf', 
{ 
    error : function(e) { 
        console.log('Error status: ' + e.status + ' - Error message: ' + e.message);
    },
    success : function () {
        console.log('file opened successfully');                
    }
  }
);

});

While playing with this plugin, you will receive this error only if you don’t have FileOpener2 plugin installed.