Problems with canvas.popDialog

I'm fairly inexperienced with TGB, but I have been trying to write a bit of an adventure game. Right now, I can get my player to trigger a shop menu gui or a dialog gui (I nhaven't written those gui's yet, just have the place holders).

I currently have the gui's triggered by a collision with the appropriate person (I know, not the greatest, but it was the best way that I know how to do it right now) The correct gui displays on the screen, but when i try to make it go away and return to the level, it never does.

my console file doesn't say anything about incorrect scripting and there is nothing about the pop.Dialog.

This is the code for one of the GUIs I am havign problems with.

function TutorialQuestGiver::onCollision(%srcObj, %dstObj, %srcRef, %dstRef, %time, %normal, %contactCount, %contacts)
{
if (%dstObj.class $= "humanPlayer")
{

//this should open the tutorial quest dialog.
canvas.pushDialog(TutorialQuest);

}
}

.....

new GuiBitmapButtonCtrl() {
canSaveDynamicFields = "0";
isContainer = "0";
Profile = "ExampleButtonProfile";
HorizSizing = "right";
VertSizing = "bottom";
Position = "416 347";
Extent = "140 30";
MinExtent = "8 2";
canSave = "1";
Visible = "1";
Command = "canvas.popDialog(TutorialQuest);";
hovertime = "1000";
groupNum = "-1";
buttonType = "PushButton";
useMouseEvents = "0";
};
};

Anyone have any suggestions?

I have the same problem with another one.

Thanks.