LAME (Lame Aint an MP3 Encoder)

I am having an issue with itunes and mp3 files encoded with lame however it
does not do it on every file. I use EAC to rip my cd and tell it to encode
to a lame 320khz mp3 file. I am ripping th album by Sum 41 - All killer no
filler. I play the files in winamp and they are fine. this is a gapless
album so all the song blend in with one another. when i go to itunes and
tell it to add these files to the library they add but i have a poping
problem. on certain tracks I hear a pop during transition between one song
to another. it does it on the ipod and I beleve it does it on itunes as
well. Is there something in the encoded file that itunes can't read
corectly? I am using visat 64 with EAC and Itunes 9.0. Please email me back
with help. Thanks. Sparkysemail@gmail.com