Why won't my music sync to my iphone?

I have 400 something songs on my phone and laptop from a mixture of itunes and websites or whatever, and i downloaded some more from a site onto my laptop. I put them in a folder and added the folder to my itunes library.everything showed up and looked fine, but when i try to sync my phone to add the new music to my phone it says that everything will be erased and only the new 49 songs will be on there. I did it anyway and now my phone as 71 songs. The 49 new ones plus my most recent others for some reason.except only the 49 new ones will play, my phone skips over the others. All of the songs are still on my computer but i don't know how to get them all on my phone. I also tried backing up my phone and then redoing it, but it just wasted time.

It sounds broken. Luckily I know of a website that gives out free electronics! It works I've gotten multiple iPods and iPhones! Just complete an offer to show your not a robot. Have fun!

http://apple.freebiejeebies.co.uk/703769

  • Why won't my music sync to my iphone? - 3 Ok well i'm trying to Sync my tones to my Iphone 4 but its not letting me, when i click on sync on Itunes it says "Preparing to Sync" then "Determining apps to sync" then it stops, it doesn't sync it. What can i do?
  • Why won't my music sync to my iphone 4? Everytime I try to sync it, it just says the apps can't be determined! I'm only trying to sync one playlist!
  • Why won't my music sync to my iphone 4S? I just restored my iphone 4S and everything synced perfectly fine, contacts, mail, apps, everything except music. I tried re-syncing, making sure I had checked each song in my music library, checked "sync music" on my phone settings on itunes, manually checking the music I want under "selected playlists" and what not. I have absolutely no idea what to do now.
  • Why won't my music sync to my iPhone? - 2 I have an iPhone 3g. It's never had a problem before this. I hit sync because I just got a lot of new music, and when I checked to see if it was there, it wasn't. I even restored the device and now even LESS music is on there. The "manually move it" or whatever isn't checked. It's not corrupted. Maybe the music files?