Open your computer's iTunes. This is the multicolored musical note icon on a white background.
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Click iTunes. It's in the top left corner of the screen.
If you're using a PC, click the Edit tab here instead.
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Click Preferences. It's toward the bottom of the drop-down menu.
You can also hold down ⌘ Command and tap + (or Ctrl++ for PC users) to open this menu.
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Select the Devices tab. You'll find it in the top right section of the Preferences window.
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Click the box at the bottom of the window. It says "Prevent iPods, iPhones, and iPads from syncing automatically" to the right of this box. Clicking it should place a checkmark here.
If there is a checkmark in this box, your iTunes won't open automatically upon connecting an iOS device.
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Click OK. Doing so will prevent iTunes from automatically adding music to your phone when you connect it.
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Connect your iPhone to your computer. To do so, plug the large end (the USB portion) of your charger cable into the computer's USB port and plug the small end into your iPhone.
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Click the device icon. It's shaped like an iPhone; you'll find this option in the upper left section of the iTunes window, above and to the right of the Music sidebar.
If this is the first time you've connected your phone to this computer, check Set Up as New iPhone when prompted and click Continue, then click Get Started.
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Scroll down and check Manually manage music and videos. It's in the "Options" section of features toward the bottom of the iTunes page.
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Click Done. It's the blue button in the bottom right corner of the iTunes page.
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Click Songs. It's in the top left side of the screen underneath the "Library" heading.
Make sure you're clicking Songs under "Library" and not "Devices".
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once u are done create a playlist in itunes and drag your songs from songs into your new playlist in itunes
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now from your new playlist select the music u want and right click which should give u a pop up menu there u should see'ADD TO PLAYLIST' and in the ADD TO PLAYLIST u should see your device
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i tried it and it worked for me so hope u do too...