Declaration error in calendar

Question

after i downloaded the calendar fmb and olb and pll i attached the library and dragged everything and when i compile the form it gives me declaration error in something called navigator , picklist and wizard the errors r:1) identifier "wizard.wizard_begin" must be declared 2)navigator.get_tree_name must be declared 3)navigator.display_tree must be declared 4)navigator.get_tree_element_value must be declared 5)wizard.wizard_show must be declared 6)refresh_trees must be declared 7)navigator.to_index must be declared
8)navigator.get_tree_element_depth must be declared
9)navigator.get_tree_element_parent must be declared
10)pick_list.list_in must be declared 11)pick_list.list_out must be declared 12)pick_list.get_picklist_element_count must be declared 13)pick_list.get_picklist_selection must be declared 14)wizard.wizard_show must be declared 15)wizard.wizard_finish must be declared

Answer 1

i use forms 10g the calendar pll and plx and olb after i dragged every thing and attached the pll i found error that some code using itemsit tells me that they r not declared