I downloaded a free ringtone from zedge.net. It worked great, so I downloaded a few more yesterday and today, and started setting specific ringtones to callers. Suddenly none of my ringtones will work! When I click "Try It", I get some sort of invalid message. I can't delete my ringtones either. Also, now I sometimes have issues playing YouTube videos. Lastly, since this happened, I can't view any of my pictures, though one I'm using as wallpaper is showing up and the one for my husband shows when he's calling. What's happening?! Need help, please!