Issue regarding View in Multiview

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ASP.NET

I am having 2 buttons if i click on button1 i would like to show view1 and if on button2 i would like to show view2

This is my design for multiview

<asp:MultiView ID="MultiView2" runat="server" Visible="false">
                        <asp:View ID="View6" runat="server">
                            <asp:Label ID="lblAddress" runat="Server" Text="Address"></asp:Label>
                            <asp:DropDownList ID="ddlAddress" runat="Server">
                            </asp:DropDownList>
                            <br />
                            <br />
                            <asp:Label ID="lblAddress1" runat="server" Text="AddressLine1"></asp:Label>
                            &nbsp;
                            <asp:TextBox ID="txtAddrLine1" runat="server"></asp:TextBox>
                            <br />
                            <br />
                            <asp:Label ID="lblAddress2" runat="server" Text="AddressLine2"></asp:Label>
                            &nbsp;
                            <asp:TextBox ID="txtAddrLine2" runat="server"></asp:TextBox><br />
                            <br />
                            <asp:Label ID="lblCity1" runat="server" Text="City"></asp:Label>
                            &nbsp;
                            <asp:TextBox ID="txtCity1" runat="server"></asp:TextBox><br />
                            <br />
                            <asp:Label ID="lblStates" runat="server" Text="State"></asp:Label>
                            <asp:DropDownList ID="ddlStates" runat="server">
                            </asp:DropDownList><br />
                            <br />
                            <asp:Label ID="lblZip" runat="server" Text="ZipCode"></asp:Label>
                            <asp:TextBox ID="txtZip" runat="server"></asp:TextBox>
                            <br />
                            <br />
                            <asp:Label ID="lblCountry1" runat="server" Text="Country"></asp:Label>
                            <asp:TextBox ID="txtCountry1" runat="server"></asp:TextBox><br />
                            <br />
                            &nbsp;<asp:Button ID="btnSave" runat="server" Text="Save" CssClass="submit_buttons"
                                Width="54px" OnClick="btnSave_Click" /></asp:View>
                        <asp:View ID="viewPhone" runat="Server">
                            <asp:Label ID="lblPhonenoType" runat="server" Text="Phone Number Type"></asp:Label>
                            <asp:DropDownList ID="ddlPhnnoType" runat="server">
                            </asp:DropDownList>
                            <br />
                            <br />
                            <asp:Label ID="lblPhoneNumber1" runat="server" Text="PhoneNumber"></asp:Label>
                            <asp:TextBox ID="txtPhoneNumber" runat="server" Style="position: absolute"></asp:TextBox>
                        </asp:View>
                    </asp:MultiView>

i write my code as follows on every button_click

MultiView2.Visible = true;
MultiView2.SetActiveView(View6);

For button2

MultiView2.Visible = true;
MultiView2.SetActiveView(viewPhone);

But i am unable to show the viewphone i am getting the error as

The view View6 cannot be found inside MultiView2, the ActiveView must be a View control directly inside a MultiView.