unable to transfer song itune libeary to iphone i try all possible but not able ask me any solution i use itune 12.0.1.26 in window vista

Won't work on Windows Vista. Must be Windows 7 or later.

• 64-bit editions of Windows 7 and Windows 8 require the iTunes 64-bit installer; for more information, visit www.itunes.com/download
• 400MB of available disk space
• Screen reader support requires Window-Eyes 7.2 or later; for information about accessibility in iTunes, visit www.apple.com/accessibility
• iTunes is now a 64-bit application on 64-bit versions of Windows 8 and 7. Some third-party visualizers may no longer be compatible with this version of iTunes. Please contact the developer for an updated visualizer that is compatible with iTunes 12.1 or later
• Apple Music, Apple Music Radio, iTunes in the Cloud, and iTunes Match availability may vary by country

From here > Apple - iTunes - Download iTunes Now

iTunes 9.0.3 for Windows Vista 32 and 64-bit