Updating a GUI control value

Hello,

I have this GUI control GuiPopUpMenuCtrl, that it's like this :

new GuiPopUpMenuCtrl(OptGraphicsResolutionMenu2) {
canSaveDynamicFields = "0";
Profile = "GuiPopUpMenuProfile";
HorizSizing = "relative";
VertSizing = "relative";
position = "256 454";
Extent = "179 20";
MinExtent = "8 14";
canSave = "1";
Visible = "1";
tooltipprofile = "GuiDefaultProfile";
hovertime = "1000";
text = "640 480";
maxLength = "255";
maxPopupHeight = "200";
sbUsesNAColor = "0";
reverseTextList = "0";
bitmapBounds = "16 16";
};


So each time my games goes in, the user can pop it down, and change the resolution.
So, let's imagine the player chooses a resolution of 1024x768, he plays and exits.
The next time he gets into the game, the game will be at 1024x768(saved in the $prefs), but in the popup window it's still 640x480 written.

What i wanted to do, is simply to change the value of the combo box, i tried like this :

OptGraphicsResolutionMenu2.setText($pref::Video::Resolution);

and

OptGraphicsResolutionMenu2.setValue($pref::Video::Resolution);

but no luck.
How can i do this ??

thanks,
Bruno