Is your device connected to the internet? Your username and password are case-sensitive, so please make sure you have entered them correctly. The email address you used to register with is not required for the log-in process.
Please check your personal settings, found in the side menu, to make sure you are not already logged in.
Please also ensure that you have selected the same log in route as the one you selected when first registering with us: If you initially registered with your Google+ or Facebook account then please select this log-in route again. If you set up your radio.net account with your email address, click on the radio.net icon and enter your username and password. Please note that it is not possible to switch between these three log-in options without setting up a new account and consequentially losing all favorites saved up to that point.