Listview

I have a listview With a Insert, Update and delete all done in a codebehind C# page. It gives an error "Incorrect syntax update"

<asp:ListView ID="ListView1" runat="server" DataSourceID="SqlDataSource1"
                            OnItemCommand="ListView_OnItemCommand"
                            DataKeyNames="SCID"

<asp:SqlDataSource ID="SqlDataSource1" runat="server" 
                                ConnectionString="<%$ ConnectionStrings:TheOneConnectionString %>"
                                InsertCommand="INSErt" 
                                UpdateCommand="update"
                                DeleteCommand="DELETE FROM [StaffContacts] WHERE [SCID] = @SCID" 
                                SelectCommand="SELECT [SCID], [ContactDesc], [NumberEmail] FROM [StaffContacts] WHERE Userid = @uid" ><DeleteParameters><asp:Parameter Name="SCID" /></DeleteParameters><SelectParameters><asp:SessionParameter Name="uid" SessionField="customerId" /></SelectParameters></asp:SqlDataSource>