Are you going into your actual email and sms apps first? Once there, hit the menu button and click on settings. Should be an option to turn notifications on or off. When you turn notifications on, then the button to choose the ringtone should become active. Hit that and a pop up box should open giving you the choice to choose between the stock android system notification sounds and Zedge sounds. Click on Zedge then click on the notification sound you want.