Adding more than one button to ToolBar?

hi there,

I want to place the following couple of button inside my ToolBar but I don't know how to proceed.

xaml:

<ToolBarTray  DockPanel.Dock="Left"  Margin="0,3,625,69"><ToolBar HorizontalAlignment="Left" VerticalContentAlignment="Bottom" Margin="10,0,0,-10" VerticalAlignment="Top" Height="600" Width="59"><ToolBar.ContextMenu><ContextMenu /></ToolBar.ContextMenu><StackPanel VerticalAlignment="Center" Width="59"><Button Content="opt1"></Button><Button Content="opt2"></Button></StackPanel></ToolBar></ToolBarTray>

A picture is worth a thousand words:

TIA,

Primary platform is Windows 7 Ultimate 64 bit along with VS 2012/Sql2k8 for WPF/SilverLight projects.