Could not getting all value...

In this code i get only one value or text.so please tell how can i get all value .
Code is.
<asp:Panel ID="panel1" runat="server">
<div align="center"><br /><br /><br /><br /><br /><br /><br /><br /><br />
<h1 style="color:red">Select Any Option.</h1>
<asp:CheckBoxList ID="chkBoxList1" runat="server" ForeColor="Red"> <asp:ListItem Value="Option1" Text="Opt1"/> <asp:ListItem Value="Option2" Text="Opt2"/> <asp:ListItem Value="Option3" Text="Opt3"/> <asp:ListItem Value="Option4" Text="Opt4"/> </asp:CheckBoxList>
<asp:Button ID="btnSubmit1" runat="server" ForeColor="Red" Text="Submit" OnClick="btnSubmit1_Cl ...