F12 causes error message

Setup:

DW04, CF as remote server, local and remote on local HD.

If I click the Refresh icon in Files | Files and then the blue Put up arrow
and then refresh an already open IE6 or FireFox, the site refreshes perfectly.

But, if neither browser is open, I open DW and then the default.cfm page and
hit F12, I get the following error:

"While executing receiveArguments in PIB_Dynamic.htm, the following JavaScript
error(s) occurred:
At line 111 of file "C:'MacromediaStudioMX04\Dreamwevaer MX
2004\Configuration\Menues\MM\PIB_Dynmaic.js":
Exception thrown in native function."

This is the referenced file:

// Copyright 2000, 2001, 2002, 2003 Macromedia, Inc. All rights reserved.

function havePreviewTarget()
{
var bHavePreviewTarget = false;

if (dw.getFocus(true) == 'site')
{
if (site.getFocus() == 'remote')
{
bHavePreviewTarget = site.getRemoteSelection().length > 0 &&
site.canBrowseDocument();
}
else if (site.getFocus() != 'none')
{
var selFiles = site.getSelection();

if (selFiles.length > 0)
{
var i;

bHavePreviewTarget = true;

for (i = 0; i < selFiles.length; i++)
{
var selFile = selFiles;
var urlPrefix = "file:///";
var strTemp = selFile.substr(urlPrefix.length);

// If this is an FTP/RDS site, we have a target.
if (selFile.indexOf("%%SERVER%%") != -1)
bHavePreviewTarget = true;

// otherwise...
else if (selFile.indexOf(urlPrefix) == -1)
bHavePreviewTarget = false;
else if (strTemp.indexOf("/") == -1)
bHavePreviewTarget = false;
else if (!DWfile.exists(selFile))
bHavePreviewTarget = false;
else if (DWfile.getAttributes(selFile) == null)
bHavePreviewTarget = true;
else if (DWfile.getAttributes(selFile).indexOf("D") != -1)
bHavePreviewTarget = false;
}
}
}
}
else if (dw.getFocus() == 'document' ||
dw.getFocus() == 'textView' || dw.getFocus("true") == 'html' )
{
var dom = dw.getDocumentDOM('document');
if (dom != null)
{
var parseMode = dom.getParseMode();
if (parseMode == 'html' || parseMode == 'xml')
bHavePreviewTarget = true;
}
}

return bHavePreviewTarget;
}

function receiveArguments()
{
var whichBrowser = arguments[0];
var theBrowser = null;
var i=0;
var browserList = null;
var result = false;

if (havePreviewTarget())
{
// Code to check if we were called from a shortcut key
if (whichBrowser == 'primary' || whichBrowser == 'secondary')
{
// get the path of the selected browser
if (whichBrowser == 'primary')
{
theBrowser = dw.getPrimaryBrowser();
}
else if (whichBrowser == 'secondary')
{
theBrowser = dw.getSecondaryBrowser();
}

// match up the path with the name of the corresponding browser
// that appears in the menu
browserList = dw.getBrowserList();
while (i < browserList.length)
{
if (browserList[i+1] == theBrowser)
theBrowser = browserList;
i+=2;
}
}
else
theBrowser = whichBrowser;

// Only launch the browser if we have a valid browser selected
if (theBrowser != "file:///" && typeof(theBrowser) != "undefined" &&
theBrowser.length > 0)
{
if (dw.getFocus(true) == 'site')
{
// Only get the first item of the selection because
// browseDocument() can't take an array.
//dw.browseDocument(site.getSelection()[0],theBrowser);
site.browseDocument(theBrowser);
}
else
THIS IS LINE 111

dw.browseDocument(dw.getDocumentPath('document'),t heBrowser)
;

}
else
{
// otherwise, if the user hit the F12 or Ctrl+F12 keys,
// ask if they want to specify a primary or secondary browser now.
if (whichBrowser == 'primary')
{
result = window.confirm(MSG_NoPrimaryBrowserDefined);
}
else if (whichBrowser == 'secondary')
{
result = window.confirm(MSG_NoSecondaryBrowserDefined);
}

// If they clicked OK, show the prefs dialog with the browser panel
if (result)
dw.showPreferencesDialog('browsers');
}
}
}

function canAcceptCommand()
{
var PIB = dw.getBrowserList();

if (arguments[0] == 'primary' || arguments[0] == 'secondary')
return havePreviewTarget();

return havePreviewTarget() && (PIB.length > 0);
}

// getDynamicContent returns the contents of a dynamically generated menu.
// returns an array of strings to be placed in the menu, with a unique
// identifier for each item separated from the menu string by a semicolon.
//
// return null from this routine to indicate that you are not adding any
// items to the menu
function getDynamicContent(itemID)
{
var browsers = null;
var PIB = null;
var i;
var j=0;
browsers = new Array();
PIB = dw.getBrowserList();
// each browser pair has the name of the browser and the path that leads
// to the application on disk. We only put the names in the menus
for (i=0; i<PIB.length; i=i+2)
{
browsers[j] = new String(PIB);

if (dw.getPrimaryBrowser() == PIB[i+1])
browsers[j] += "\tF12";
else if (dw.getSecondaryBrowser() == PIB[i+1])
browsers[j] += "\tCmd+F12";

browsers[j] += ";id='"+escQuotes(PIB)+"'";

if (itemID == "DWPopup_PIB_Default")
browsers[j] = MENU_strPreviewIn + browsers[j];

j = j+1;
}
return browsers;
}


Please help.

THank you.