Fallout 3 Fawkes-bug

I have got Fawkes for a long time, but suddenly I got a problem.

When i try to start a dialogue with Fawkes, I only get his reply as;

"Something troubling you my friend?"

"You got something to say?"

But I don't hear his voice, and I'm just stock there, and I have to reload. I have tried if it works with an older savegame, and it does, but I don't know why im stock there, and I don't wan't to start over the last couple of quests, can anyone help me?

yeah i think that happened to me before on my first file, i think a lot of the sound was cut out too not just voices lol, but that was an old file

Game of the year baby !! :D