Product creation with purchase landed cost: error message

Just after intalled the purchase landed cost, I tried to open a product form or create a product and the following error message is display:
 Error: AttributeError: View definition error for inherited view 'purchase_landed_costs.c2c_product_landed_cost_view' on model 'product.product': Element '<field name="active">' not found in parent view 'product.product_normal_form_view'

On the following link, I found someone who had the same error, but the solution proposed does not work for me. You can see my commnent about that.

http://help.openerp.com/question/9902/purchase_landed_costs-module-error-openerp-7/?answer=11768#post-id-11768

I hope you can give me a hint on how can I fix it.

Thank you in advance.