Error when clicking two buttons in serial order

I am doing the following:

function Test1()

{

var singleCaptureView;

singleCaptureView = Aliases.Auto2.InteractiveAcquisition;

singleCaptureView.ObjectiveSelect.buttonObjective40x.ClickButton();

//delay(2000);

singleCaptureView.LightSource..ChannelButton.ClickButton();

}

If I leave the delay out, I get the following:

Possible reasons:
1. The application stopped responding.
2. The application was compiled incorrectly (see the Open Applications topic in the help system).
3. An error occurred in TestComplete.

Technical information:
378 0x84000001 () .

Tested object:
Aliases.Auto2.InteractiveAcquisition.LightSource..ChannelButton

In both cases (with/without the delay)  the ChannelButton is clicked and the proper action is executed.  I have tried delaying the ChannelButton click until all parameter changes on the Objective button are updated but that has not worked.  The application itself does not throw an error, only TestComplete.