Home Sharing Troubles

Previously while at home i sync my Iphone 4.S with itunes via wifi to access my home library of music. Recentally I got the new upgrade and since ive tried to use home sharing with wifi to sync with my iphone to acess music as i did before udpate but it doesnt show allt he music in my library. I have restarted my computor, updated the newest version of itunes, updated the newest version of iphone but my whole music library is still not being shown while synced with itunes just several artists. any help would be appericated. thanks.