Getting MPEG video inot FC Studio

I'm currently using Final Cut for my editing system. For some reason, the mpeg files from my camera are not coming over into Final cut with any audio. They will play fine w/ sound on my quicktime player but go mute when in final cut. I'm going through and turning each individual mpeg into an avi using a program on another computer. this works, but it is very tedious and time consuming. I was wondering if there was a more direct way to convert or modify mpeg files to work in final cut studios with sound.