CheckMenuItem layout problem in button menu

[his363]

hi,
It can't display checkmenuitem with table layout.
here is a part of my source.
how can I fix them?

<ext:Panel ID="Date_EveryMonth_Panel" runat="server" Border="false">
	<Items>
	  <ext:Button ID="SelectDay_Button" runat="server" Width="200">
		<Menu>
		  <ext:Menu runat="server" Layout="TableLayout">
			<LayoutConfig><ext:TableLayoutConfig Columns="6" /></LayoutConfig>
			<Items>
			  <ext:CheckMenuItem ID="CheckMenuItem1" runat="server" Text="1" CheckHandler="updateSelectDayButtonText" />
			  <ext:CheckMenuItem ID="CheckMenuItem2" runat="server" Text="2" CheckHandler="updateSelectDayButtonText" />
			  <ext:CheckMenuItem ID="CheckMenuItem3" runat="server" Text="3" CheckHandler="updateSelectDayButtonText" />
			  <ext:CheckMenuItem ID="CheckMenuItem4" runat="server" Text="4" CheckHandler="updateSelectDayButtonText" />
			  <ext:CheckMenuItem ID="CheckMenuItem5" runat="server" Text="5" CheckHandler="updateSelectDayButtonText" />
			  <ext:CheckMenuItem ID="CheckMenuItem6" runat="server" Text="6" CheckHandler="updateSelectDayButtonText" />
			  <ext:CheckMenuItem ID="CheckMenuItem7" runat="server" Text="7" CheckHandler="updateSelectDayButtonText" />
			  <ext:CheckMenuItem ID="CheckMenuItem8" runat="server" Text="8" CheckHandler="updateSelectDayButtonText" />
			  <ext:CheckMenuItem ID="CheckMenuItem9" runat="server" Text="9" CheckHandler="updateSelectDayButtonText" />
			  <ext:CheckMenuItem ID="CheckMenuItem10" runat="server" Text="10" CheckHandler="updateSelectDayButtonText" />
			  <ext:CheckMenuItem ID="CheckMenuItem11" runat="server" Text="11" CheckHandler="updateSelectDayButtonText" />
			  <ext:CheckMenuItem ID="CheckMenuItem12" runat="server" Text="12" CheckHandler="updateSelectDayButtonText" />
			  <ext:CheckMenuItem ID="CheckMenuItem13" runat="server" Text="13" CheckHandler="updateSelectDayButtonText" />
			  <ext:CheckMenuItem ID="CheckMenuItem14" runat="server" Text="14" CheckHandler="updateSelectDayButtonText" />
			  <ext:CheckMenuItem ID="CheckMenuItem15" runat="server" Text="15" CheckHandler="updateSelectDayButtonText" />
			  <ext:CheckMenuItem ID="CheckMenuItem16" runat="server" Text="16" CheckHandler="updateSelectDayButtonText" />
			  <ext:CheckMenuItem ID="CheckMenuItem17" runat="server" Text="17" CheckHandler="updateSelectDayButtonText" />
			  <ext:CheckMenuItem ID="CheckMenuItem18" runat="server" Text="18" CheckHandler="updateSelectDayButtonText" />
			  <ext:CheckMenuItem ID="CheckMenuItem19" runat="server" Text="19" CheckHandler="updateSelectDayButtonText" />
			  <ext:CheckMenuItem ID="CheckMenuItem20" runat="server" Text="20" CheckHandler="updateSelectDayButtonText" />
			  <ext:CheckMenuItem ID="CheckMenuItem21" runat="server" Text="21" CheckHandler="updateSelectDayButtonText" />
			  <ext:CheckMenuItem ID="CheckMenuItem22" runat="server" Text="22" CheckHandler="updateSelectDayButtonText" />
			  <ext:CheckMenuItem ID="CheckMenuItem23" runat="server" Text="23" CheckHandler="updateSelectDayButtonText" />
			  <ext:CheckMenuItem ID="CheckMenuItem24" runat="server" Text="24" CheckHandler="updateSelectDayButtonText" />
			  <ext:CheckMenuItem ID="CheckMenuItem25" runat="server" Text="25" CheckHandler="updateSelectDayButtonText" />
			  <ext:CheckMenuItem ID="CheckMenuItem26" runat="server" Text="26" CheckHandler="updateSelectDayButtonText" />
			  <ext:CheckMenuItem ID="CheckMenuItem27" runat="server" Text="27" CheckHandler="updateSelectDayButtonText" />
			  <ext:CheckMenuItem ID="CheckMenuItem28" runat="server" Text="28" CheckHandler="updateSelectDayButtonText" />
			  <ext:CheckMenuItem ID="CheckMenuItem29" runat="server" Text="29" CheckHandler="updateSelectDayButtonText" />
			  <ext:CheckMenuItem ID="CheckMenuItem30" runat="server" Text="30" CheckHandler="updateSelectDayButtonText" />
			  <ext:CheckMenuItem ID="CheckMenuItem31" runat="server" Text="31" CheckHandler="updateSelectDayButtonText" />
			  <ext:CheckMenuItem ID="CheckMenuItem32" runat="server" Text="마지막" CheckHandler="updateSelectDayButtonText" />
			</Items>
		  </ext:Menu>
		</Menu>
	  </ext:Button>
	</Items>
  </ext:Panel>