iTunes is not adding AAC files
When I rip a CD using Winamp, it creates AAC files using this encoder:
MP4/LC-AAC Encoder v1.2
However, when I add these files to iTunes (using File -> Add Folder to Library) they do not appear in the Library.
Am I using the wrong Winamp encoder? Please note that other AAC files that I download appear when I add these to iTunes.
iPod 3G 15 GB, Windows XP Pro