flash actionscript: I have a movie with attached sounds from the library (linked). It runs perfect
alone. But when I load this movie into another movie sound cannot be heard.
The sounds are ativated via the button component I dont know if thats the
problem. Any ideas??

your swf looks in the _root timeline's library for the sound. when you run
your swf alone, the _root timeline's libary is the library with the sound.
when you load your swf the movie containing the loadMovie() statement contains
the _root timeline.

to remedy, in your loaded swf use:

yourSound=new Sound(this);

instead of

yourSound=new Sound();

That did the job THANK YOU THANK YOU
Is this the case for other loaded assets or is it only the sound object?
Great

all linked items are problematic when they are contained in a library that's
loaded into another swf.

usually, you have to use shared assets to remedy. i can't think of any other
situation where you can access the loaded movie's library without using shared
assets, except for the Sound() class.