Unable to Download Music From iTunes
You can download music from the iTunes store directly from your iPod, iPhone or iPad, or using the iTunes program installed on your computer. Occasionally, you may run into some music download problems. Some of these problems are caused by faulty Internet connections, low cellular data connections and parental controls. With a few troubleshooting steps and guidelines, resolve these problems, and download your favorite tunes.
Check your Internet connection and make sure you are connected to your network. If you are using a wireless connection, make sure you are within range of the wireless router. Refer to your Internet connection or Internet Service Provider's (ISP) documentation if your connection is not working.
Make sure you have proper cellular data service (3G) if you are unable to download music from the iTunes store on your phone.
Make sure you are logged on to your iTunes account using your screen name and password. Check the status of your downloads by tapping "More," and then "Downloads" on your iPhone or iPod Touch. Just tap "Downloads" if you are using an iPad.
Check your device's parental controls from the settings menu to ensure the feature isn't blocking some of your downloads. Adjust the content restrictions if some of the music you are trying to download falls into the categories of content being blocked.