No music when talking to some civs

[Wardog]

On modern times, there is no music on the dialogue box when I talk to some civs like the Romans, Greeks and Egyptians. Every music and sound is perfect, but I get silence when click on the diplomacy box and start negotiating with to them, no matter if we are warring or not.

Funny it happens just with some civilizations, and only on modern times. I'm playing Civ 3 1.29f, and haven't changed anything on the songs/mp3 folder.

Does anybody has any idea of what it might be?

Thanks.