I have module that implements custom content type via NodeAPI hooks (hook_insert, hook_update etc). I want to add CCK field to this content type and populate it via hook_nodeapi calls like create or update (to show content nodes in Views).

Problem is, I cannot access CCK fields for this content type. Sure, it's enabled on "Manage Fields" page, but when I load any node of this type with Devel module, I cannot see field attribute (field_flag) in node object. I can see it under "Dev Render" tab as part of "content" attribute, like $node->content['field_flag']['#value'], but if I assign value to $node->field_flag or $node->content['field_flag']['#value'] and call node_save, CCK fields are not saved.

Maybe I must call some other function to save CCK fields? Or what may be wrong with this setup?