Directory Programming .NET

I'm having an issue removing a person from a group.  I receive the following error:

The server is unwilling to process the request. (Exception from HRESULT: 0x80072035)

Here's my code (Sorry it's in VB.NET :-) )

The sGroupDN is the DN of the group I'm trying to remove the person from.
We are at Windows 2003 Functional level in the forest and domain.
I get the error on the CommitChanges method.

    Private Sub removeGroup(ByVal sGroupDN As String, ByVal sUID As String)
        Dim entry As New DirectoryEntry("LDAP://MRP03:389/" & sGroupDN, cLdapUID, cLdapPWD, AuthenticationTypes.Secure)
        Using entry
            Try
                entry.Properties("member").Remove("CN=Bob Smith")
                entry.CommitChanges()
            Catch ex As Exception
                writeLog("ERROR - REMOVE GROUPS: " & sUID & " | " & ex.Message.ToString)
            End Try
        End Using
    End Sub

I Feel stupid.  The remove method uses a DN not CN.

AARGH.... too many late nights.

There are some samples for this actually that you can download here (if you haven't seen them yet).  While you might have to apologize to me for VB.NET (not really :)), Joe is a native VB'er, so he feels right at home with it.  It's only me that has to struggle to remember my VB.NET syntax.

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Ryan Dunn
Extemporaneous Mumblings
The .NET Developer's Guide to Directory Services Programming