Hello alat8101998
Try removing the music from your iPhone by unchecking the Sync Music in the Music tab and sync. Once removed, select the options again and sync to see if that changes things. If that does not work, then drag and drop the music to your iPhone to sync as well. You can also try to convert the songs that are not making it over to a different format and then sync.
iTunes 11 for Windows: Set up syncing for iPod, iPhone, or iPad
http://support.apple.com/kb/ph12313
Managing content manually on iPhone, iPad, and iPod
http://support.apple.com/kb/HT1535
iTunes: How to convert a song to a different file format
http://support.apple.com/kb/ht1550
Regards,
-Norm G.