Sound Volume Issues

I am using about 24 different sound clips (mp3 files) in my flash piece, all loaded using the attachSound() method.

The problem I am having is that the volume of the sound output (its all voiceover) can vary by about 10-25%, even for the same clip. I will play one sound, then the next one loads and it blasts through the speakers. The next sound will load and it is not as loud. I can go back to the sound that blasted and it seems to be back to normal.

I have tried using setVolume() when I load all the sounds to try and equalize them (setting the level to 75), but it doesn’t seem to help.

Anyone else have anything like this happen?