ASP.net strange error in Update query

Hi

I get an error in the following code
"Incorrect syntax in UPDATE Statement"
If I do exactly the same query in my Access database it works
Is it the Code that I am using

Sub UpdateNewEmailAndPassword(ByVal sEmail As String, ByVal sPassword As String)

        '// define a connection to the database
        Dim cs As String = ConfigurationManager.ConnectionStrings("WhatEverNameYouWant").ConnectionString

        cs = cs.Replace("App_Data\GC.accdb", Server.MapPath("App_Data\GC.accdb"))

        Dim cn As New OleDbConnection(cs)


        Try


            Dim sSQL As String
            sSQL = "UPDATE MyUsers SET Password = '" & sPassword & "' WHERE Email = '" & sEmail & "'"
            'sSQL = "INSERT INTO MyUsers ( [Email], [Password], [FirstName], [Logins] ) SELECT '" & sEmail & "' AS Expr1, '" & sPassword & "' AS Expr2, '" & sFirstName & "' AS Expr3, '" & "First login " & CStr(System.DateTime.Today) & " Subsequent logins " & "'"

            '// define the sql statement to execute
            Dim cmd As New OleDbCommand(sSQL, cn)

            '    '// open the connection
            cn.Open()

            cmd.ExecuteNonQuery()

        Catch ex As Exception
            Response.Write(ex.Message)
        Finally
            If cn.State <> ConnectionState.Closed Then
                cn.Close()
            End If
        End Try
    End Sub

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