Okie doke how are you doing it?
Try this way. In iTunes click on "file" then "add file to library". Select where you want to add the song from. Only do one song at a time to see if this works. If it does you will see a pop up window informing you that you need to convert that file. Click on convert.
If this works with one song the. You can do more than one song at a time by holding down ctrl and selecting several song. In my experience you can only convert several songs at a time if they are coming from the same folder.
You have to wait till that song is completely converted before selecting another song to convert.
If when you select a song to convert you don't get the window asking you if you do indeed want to convert it isn't ready yet.
Lol my bad....ok the steps u gave me I did already it only worked for one song. I have more songs in my music folder but they won't convert to my iTunes library. Then I have songs already in my iTunes library that won't sync to my phone.
I have a few songs on my phone that sync, but won't play on my iPhone (didn't work on my 3GS and don't work on my new 4S). When I get to those songs, on the 3GS it skipped them, but my 4S completely bugs out, stops playing, and won't resume on a new song till I kill the app from the multitask bar. Any ideas as to why this happens? (also these songs work fine on my PSP, so it's not a file issue.)
There may be a problem with the encoding for the song files you downloaded. If they're in your music folder, try Control-Clicking on one and selecting "create AAC version". Then try to add that new AAC version to your iTunes Library and see if it syncs.