Parent Item Price Updation

Hi,

I have some BOM Products (Sales BOM) and the company follows Price list. I need to update the price of Parent Item when the changes happens in the price of the child items.I already tried to use "Update parent Item Prices Globally" menu but it results the error message that "No parent item prices to be "updated found  [Message 65020-3].How i update the price of Parent Items..???

Regards

Janeesh