Targetting attached movieclip question

[SIZE=2]

i have a problem adressing or targetting a attached mc

when i target de mc directly it works fine but when i try it trough a variable it doesnt recognise its path anymore???

hopefully a part of the code is gonna explain the situation a litle better…

this piece works fine:

decrement and increment are two functions
[COLOR=DarkSlateGray]/////////////////////////////////////////////////////////////////////////[/COLOR]

[COLOR=Navy]ThisItemNumber.onRollOver = function() {
this.but1_1.Decrement(50, 2);
};
ThisItemNumber.onRollOut = function() {
this.but1_1.Increment(100, 2);
};[/COLOR]
[COLOR=DarkSlateGray]//////////////////////////////////////////////////////////////////////[/COLOR]

[COLOR=Black]this doesnt work[/COLOR]
[COLOR=DarkSlateGray]//////////////////////////////////////////////////////////////////////[/COLOR]

[COLOR=Navy]ThisItemNumber.onRollOver = function() {
var WichButOver = [“but1_”+this.numbr];
this.WichButOver.Decrement(50, 2);
trace(WichButOver);
[/COLOR]
[COLOR=DarkSlateGray]//trace = but1_1 if you rollover but 1
//trace = but1_2 if you rollover but 2[/COLOR]
[COLOR=Navy]};

ThisItemNumber.onRollOut = function() {
var WichButOver = root["but1"+this.numbr];
this.WichButOver.Increment(100, 2);
trace(WichButOver); [/COLOR]

[COLOR=DarkSlateGray]//trace = but1_1 if you rollover but 1
//trace = but1_2 if you rollover but 2[/COLOR]
[COLOR=Navy]};[/COLOR][/SIZE]

hopefully yall know what i’m talking about…
tnx in advance…

desperado redg