Target/access button inside (attach) movieclip

Hi everyone,
im new to flash and actionscript v2.
would be great if i could get a shove in the right direction.

im trying to get a button working that is inside a movie clip.
the movieclip is given a linkage identifier (container_id and name as container_mc) as it is inside the library and not on the stage.
The movie clip has three buttons inside it.
I have the following code on each of the button

_root.containerBase_mc.scrollUp_btn.onRelease = function() {
 trace("scrol upn");
this.containerBase_mc.scrollDown_btn.onRelease = function() {
   trace("scrol down");
this._parent.containerBase_mc.close_btn.onRelease = function():Void{
 trace("close me");

as you can see my desperate attempts to get this working
none of the trace actions work…
any help?
thank you.