New Post: Checked List Box

I had downloaded toolkit and used check list box in my WPF form.but
not getting these things
SelectedMemberPath="IsSelected"
SelectedValue="{Binding SelectedValue}"
SelectedItemsOverride="{Binding SelectedItems}"
is there any other thing that i have to do to get this ?

and also

how can i check a checklistbox item based on index ?
Thanks

Deepu