Need help with dynamic music please

Hello Everybody, i am making some tests and learn how to build a map for UT3.
I see there are different situations for music. Like Intro, Combat, End, Suspance, etc.
I set a cue for Intro (looped), and another cue with another wav for Combat, but ingame the music won’t change. It plays intro forever.
Also, End seems to dont work, at the end of the match, it still plays Intro.
Can someone explain me please how it works? Thanks a lot!!

My dynamic music is based on timers, I never use looping. It plays a chain of segments and checks pre-defined conditions after each one to determine which segment should be played next. The second way is using layers. Simply play multiple tracks with the identical duration at the same time and control their volume dynamically.