Interfaces screwup question

[Lloyd Sheen]

I have the following in one form:

Public Class ExeScript
Inherits System.Windows.Forms.UserControl
Implements ToadInterfaces.Interfaces.GotFocus,
ToadInterfaces.Interfaces.HasConfiguration, ToadInterfaces.Interfaces.UCForm

and the implementation is

Public ReadOnly Property SBToolBar() As TD.SandBar.ToolBar Implements
ToadInterfaces.Interfaces.UCForm.SBToolBar

Definition of the interface is:

Public Interface UCForm
Property DocumentManagerDocument() As DocumentManager.Document
WriteOnly Property Configuration() As Configuration
Function CleanUp() As Boolean
Function FormKeyStrokes(ByVal kpe As System.Windows.Forms.KeyEventArgs) As
Boolean
Property HasChanges() As Boolean
ReadOnly Property SBToolBar() As TD.SandBar.ToolBar
End Interface

I get an error:
C:\Documents and Settings\MyName\My Documents\Visual Studio
Projects\ToadUI\ExeScript.vb(14): 'ToadUI.ExeScript' must implement
'ReadOnly Property SBToolBar() As TD.SandBar.ToolBar' for interface
'ToadInterfaces.Interfaces.UCForm'. Implementing property must have matching
'ReadOnly'/'WriteOnly' specifiers.

I have the same implementation and definition is about 5 other UserControls
with no problem.

Any ideas??

Lloyd Sheen