I downloaded iPod Wheather.Mail.Notes.Stocks.Maps 2.1 using iAppCat and after I downloaded it and exited out of installer the normal swirly circle in the middle started. But then it froze so I turned it off using the power and menu button. But now, when I turn it on, it just stays on the Apple icon and doesn't do anything. My computer recognizes it but it won't open up to the home menu. What do I do?