getbounds() returns undefined

[kidap]

I am using flash 8 but publishing to flash 6. When I test the following code by publishing to flash player 6, give me proper x and y min and max values. When I publish to 7 or higher I get "undefined". The getBounds() function does not appear to be depricated. Any ideas?

var getlimits = instMask.getBounds(this._parent);

[jdurand]

test is a 300 x 200 movie clip sitting at 0,0

Both of these methods worked for me in 8

var getlimits = test.getBounds(this);
trace (getlimits.xMax) ; //Returns 300
trace (getlimits.xMin) ; //Returns 0
trace (getlimits.yMax) ; //Returns 200
trace (getlimits.yMin) ; //Returns 0

for (var i in getlimits) {
trace(i+" --> "+getlimits[i]);
}
//Returns
//yMax --> 200
//yMin --> 0
//xMax --> 300
//xMin --> 0