Importing mp3 - loss of quality? Terrible clicking sounds!

Hi there,

I am working on a project editing audio interviews. Previously these were recorded as .wav files and I imported them to audacity and edited them easily. I just received a new batch of interviews recorded as .mp3s. I’ve downloaded the files, and when I play them (with itunes or another player) they sound fine. But when I import to audacity for editing, the file is full of terrible clicking sounds! Can anyone help me figure out what’s going on? Thanks a bunch.