Loading an external mc/swf file

i have made this mc and when you click on it, it loads an external mc (_root.blank3.loadMovie(“mc.swf”)

Here is the actionscript when clicked on:

[AS]
onClipEvent (enterFrame)
{
var speed = 4;
var viscosity = 1.300000;
difference = whld3 - this._width;
xvelocity = (xvelocity + difference / speed) / viscosity;
this._width = this._width + xvelocity;
difference = hhld3 - this._height;
yvelocity = (yvelocity + difference / speed) / viscosity;
this._height = this._height + yvelocity;
}

on (rollOver)
{
if (oneup == “no”)
{
_global.whld1 = 143.200000;
_global.hhld1 = 87.500000;
_root.b1._x = xhld1;
_global.whld2 = 143.200000;
_global.hhld2 = 87.500000;
_root.b2._x = xhld2;
_global.whld3 = 143.200000;
_global.hhld3 = 87.500000;
_root.b3._x = xhld3;
_global.whld4 = 143.200000;
_global.hhld4 = 87.500000;
_root.b4._x = xhld4;
_global.whld5 = 143.200000;
_global.hhld5 = 87.500000;
_root.b5._x = xhld5;
_global.xhld = xhldog;
if (last == “b1”)
{
_root.nav1.gotoAndPlay(16);
}
else if (last == “b2”)
{
_root.nav2.gotoAndPlay(16);
}
else if (last == “b4”)
{
_root.nav4.gotoAndPlay(16);
}
else if (last == “b5”)
{
_root.nav5.gotoAndPlay(16);
} // end if
_global.last = “b3”;
_root.nav3.gotoAndPlay(2);
_global.whld3 = 163.200000;
_global.hhld3 = 107.500000;
_global.whld2 = 123.200000;
_root.b2._x = 239.600000;
_global.whld4 = 123.200000;
_root.b4._x = 528.100000;
} // end if
}

on (release)
{
if (oneup == “no”)
{
_global.whld3 = 183.200000;
_global.hhld3 = 307.500000;
_global.whld2 = 103.200000;
_global.whld4 = 103.200000;
_root.nav3.gotoAndPlay(16);
** _root.blank3.loadMovie(“mc.swf”);**
_root.blank3._alpha = 100;
_global.oneup = “yes3”;
} // end if
}
[/AS]

But when you click, nothing happens. The external mc doesn’t appear or seem to load. Whats wrong? Do I need to specify more specifically like a url? (eg. http://www.sgroove.com/mc.swf)