Hello. I'm new to guitar tricks. And i've been playing along with yopur lessons for beginners. My question is : I can only login with my pc. When i try to login with your app in my iphone or apple tv, it asks me to log with my user name and password. I've tried change the password but it sends me to a page where it says "you're already logged in as luiscventura", and the only way to get out of this page is to go back to the login page. Am i doing something wrong or is it impossible to interchange between the pc and the ios apps? Thanks in advance.