Why won't itunes sync my CD onto my iphone?

I brought two albums and put them on my itunes but when I plug my iphone into my laptop the two albums won't go on to my phone? Why is it doing this and how can I make it work? Its been frustrating me for months!
Also before when I had a blackberry ages ago I put videos up from when I went to see lady gaga on my laptop, can I put those videos onto my iphone to?

Have you done all updates to computer, iTunes and phone.
Is you settings set to sync only checked songs? Playlists?
When you look at the summary tab under 'Music', does the new music show? Did you check sync music?

  • Why won't my iTunes sync my music onto my iPhone? When I plug my iPhone into my laptop and open iTunes to sync my music, it starts to back up all my things onto my computer but it never actually goes passed the backing up, it just stays on that. I've left my phone being plugged into the laptop for over 2 hours and when I returned it said it was still backing up. I want my music on my phone but I don't know why it won't work, help?
  • Why won't my Amazon MP3's sync onto iTunes? I downloaded two albums today from Amazon.co.uk via the usual Amazon mp3 downloader. But, when I open iTunes and sync my iPhone, the albums do not automatically appear as normal. Yet, the files for the downloaded albums are in the iTunes folder in 'My Music'.
  • Why does iTunes need internet access to sync music CDs onto my library? I noticed my internet went out and while syncing music cd's I noticed it didn't show the track names without internet out of curiosity I'm wondering why it needs access to syncing cd's onto my iTunes?
  • Songs in itunes won't sync to ipod but will sync to iphone? So i have over a 1000 songs in my itunes library and they will all sync to my iphone no problem. But when i try to sync to my ipad (which has enough memory available) it will not.