VBScript to list Unavailable Mapped Drives

I have been using some simple VBScript to identify a users mapped drives but have found all sample scripts I have tried omit any Mapped Drive that is Unavailable (as listed in CMD Net Use)

Because I need to remove such drives before remapping how can I identify any that are already unavailable?

Sample script lists drives nicely but only those with a Status of OK:

On Error Resume Next

Dim objNetwork, objDrives, objShell
Dim strSubst, strSubstVal, strSubstName, strEnumDrive

Set objNetwork = CreateObject("WScript.Network")
Set objShell = CreateObject("Shell.Application")
Set objDrives = objNetwork.EnumNetworkDrives

For i = 0 to objDrives.Count - 1 Step 2
	strSubst = objShell.NameSpace(objDrives.Item(i) & Chr(92)).Self.Name 
	strSubstVal = inStr(1,strSubst, Chr(40)) - 2
	strSubstName = Mid(strSubst, 1, strSubstVal)
	strEnumDrive = strEnumDrive & "Drive Letter: " & objDrives.Item(i) & vbCrlF & _
		"Drive Name: " & strSubstName & vbCrlF & "Drive Path: " &  _
		objDrives.Item(i+1) & vbCrLf & vbCrLf
Next
MsgBox strEnumDrive ,, "All mapped Drives"

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Any suggestions on modifying this script or using another method?