Worldmap idea with projects

I made a worldmap which is a movieclip, and inside that worldmap I create dynamicly project icons which contain a text balloon with some short information about that project.

The problem I’m facing is that I want to make the text balloon appear on mouseover, and when I press the movieclip, it goes to another page.
I’ve been trying this for a while but I can’t find a good solution, onRollOver and onPress on movieclips won’t work, and I have no clue how else I could do it. The reason why I add them inside the worldmap is because I want to zoom in and out or move the map in certain directions.

Another problem I faced was, that when I zoom in and out on the map, the icons become largers as well. How can I make it so that the icons always stay the same size?

The flashmx8 file can be found at: http://stud.cmd.hro.nl/0775659/various/worldmap.zip
The code is at the first layer called “scripts” in the first frame.
The code for adding dynamicly dots onto the map is at line: 72 and the code for zooming starts at line: 131, and basicly the whole actionscript is in the first frame to keep it easy and mobile to tweak the whole application.

Anyways, I hope I’m not too much of a problem, but right now I’m a bit stuck on this school project, and teachers at school seam to know even less then I do which is really frustrating so I thought maybe a few people here are willing to help me out or find another solution.