Field visibility

I have a text field that I'm trying to make visible or invisible based on the value of a checkbox in LiveCycle Designer 8.2 The javascript seems to trigger, but it doesn't change the visibility of the checkbox. Here's the code...

EquiptReqForm.MainForm.AppReqs.CLMCentral::change - (JavaScript, client)

if (this.rawValue == 1)
{
ClmDetails.presence = "visible";
ClmDetails.mandatory = "error";
ClmDetails.mandatoryMessage = "Specify Health Plans, Medical Groups, and Master Calendar Partners if CLM Central is selected.";
}
else
{
ClmDetails.presence = "invisible";
ClmDetails.mandatory = "disabled";
}

CLMCentral is the checkbox; ClmDetails is the text field (which defaults to invisible). Both controls are in the same sub-form. I get the mandatoryMessage after checking and un-checking the box, but the text field never becomes visible.

Is there something obvious that I'm missing?

UPDATE: The problem seems to be specific to the visibility code; with those lines commented out, the code that makes the field mandatory seems to work.