RadTextBox not re rendering after close radwindow

[Laura]

I have a parent window and a child window open on the click on a button in the parent window. The click of the button opens the child window with a radgrid inside. The user selects a row, and then returns to the parent window. I have an onclientclosed javascript function in the parent window process the data (in args) sent back to the window). I am using one of the args (Name) to fill up the radtextbox. On the return to the parent window, the child window closes, and I set the radtextbox to the value, but the value does not appear in the radtextbox. If I then click in the textbox, the name appears.

If I change the radtextbox to an asp textbox, it works fine.

Here is my code:

function OnClientPublisherClose(oWnd) {

        if (oWnd.returnCode == 0)  // if returnCode is 0, user cancelled - don't change anything
            return;

        if (oWnd.returnCode == -1) // user pressed clear - clear out values
        {
            var txtbxPublisherName = document.getElementById('publisherName');
            txtbxPublisherName.value = "";
            var txtbxPublisherID = document.getElementById('txtPublisher_id');
            txtbxPublisherID.value = -1;  // know that it is not valid so when writing out, write out null
            return;
        }

        //get the transferred arguments
        var publisher_name = oWnd.argument.publisherName;
        var publisher_id = oWnd.argument.publisherID;

        var txtbxPublisherName = document.getElementById('publisherName');
        txtbxPublisherName.value = publisher_name;

        var txtbxPublisherID = document.getElementById('txtPublisher_id');
        txtbxPublisherID.value = publisher_id;
    }

 <telerik:RadTextBox ID="publisherName" runat="server" ReadOnly="true"  >
                    </Telerik:RadTextBox>