Error when use TestNG @Parameter

Support
1

I am trying to use @Parameter to pass language value, to let my test re-run with a new driver initialized with capabilities.setCapability(“language”,language);
So I can have the suite run on language, then rerun on language2 automatically.

My xml: <?xml version="1.0" encoding="UTF-8"?>

My code: @BeforeClass(alwaysRun = true) @Parameters("language") public void startDriver(String language) throws Exception{ driver=driverFactory.getIOSDriver(language,service); System.out.println("start driver"); } 
@Test 
public void login() { 
... 
}

I read previous posts about this error and did:

  1. Use my testng.xml as template in project properties
  2. Right click testng.xml->run as testng suite
  3. Select my .java test file and right click->run as testng test

But still get this error, could anyone provide kindly help? Thank you!