ActionScript 1/2 :: HitTest And Draggable MCs?

These codes are in the draggable MC: fish1_drag this is my code:
 
onClipEvent (enterFrame) {    this.onPress = function() {        startDrag(this);    };
_root.UI1_mc.UI1_mc2.inv_mc.ISpace1.onEnterFrame = function() {        if (this.hitTest(fish1_drag)) {            stopDrag();        } else {        }    };}
 
I keep jumbling it up so that one thing works but the other doesnt. But basicly I need it so that when I drag fish1_drag (instance name) over ISpace1 (which is within many MCs : _root.UI1_mc.UI1_mc2.inv_mc.ISpace1 but opens up so you can drag it over it) for it the drop on the ISpace1.
 
I have another MC in the library and il get that the attach to the ISpace1 but what im finding difficult is just being able to drag the fish1_drag over the ISpace1 and releasing.
 
Here is some other reandom code that I have in a comment on my AC panel:
 
/*
this.onRelease = function() {                stopDrag();                _root.UI1_mc.UI1_mc2.inv_mc.ISpace1.attachMovie("fish1_mc","attached1 ",this.getNextHighestDepth());                _root.invCount += 1;                updateAfterEvent();  // I probly dont need this updateAfterEvent. but its there anyway.            };
*/