My itouch will not sync with itunes anymore. a window pops up and says I need to enable my computer to sync and I don't know what to do

Syncing music manually If you prefer not to automatically sync music content to your iPod, you can set up manual syncing.

1. Connect your iPod to your computer and open iTunes.
2. Select iPod in the Devices section on the left side of the iTunes window.
3. In the main iTunes browser window, select the Summary tab.
4. Select the option to "Manually manage music and videos" or "Manually manage music." This will deselect the automatic sync settings for the Music, Movies, and TV Shows tabs. Automatic syncing for Podcasts, Photos, Contacts, and Games can be individually disabled by selecting those options in each of those tabs. Note: When manually managing iPod, disk use is enabled and iPod must always be manually ejected in iTunes before disconnecting it from your computermy itouch will not sync with itunes anymore. a - ht1351_8.jpg="/uploads/images/ht1351_8.jpg" alt="ht1351_8.jpg" class="h_mi" />
5. Click Apply.
6. To manually add music, audiobooks, movies or TV shows to your iPod, choose one of these categories under Library on the top-left of the iTunes window.
7. Select and drag items you want (to choose multiple items, Command-click items on a Mac or Control-click items in Windows), then drag them onto your iPod icon under Devices.
8. To add a playlist, select it from the left side of the iTunes my itouch will not sync with itunes anymore. a - ht1351_9.jpgrag it onto your iPod in the same way.
9. When you are ready to disconnect your iPod, select it under Devices and click the eject icon next to it.