Error on Custom Forms

I'm trying to disable a command bar that has occassionally caused problems
in a custom form. I came up with this routine:

Sub SetCmdBars(ByVal boolVal)
Dim oF
Dim oCB

Set oF = Item.GetInspector
For Each oCB in oF.CommandBars
If oCB.Name = "Standard" Then
oCB.Enabled = boolVal
oCB.Visible = boolVal
End If
Next
oF.CommandBars("View").Enabled = boolVal
oF.CommandBars("Tools").Enabled = boolVal
oF.CommandBars("Actions").Enabled = boolVal
End Sub

.... and some users are getting the error message:
"You don't have appropriate permission to perform this operation." and the
line number points to the script code line: "Set oF = Item.GetInspector".

Anyone have any ideas?

Thanx!


--
TFWBWY...A