Automatic Posting of item charges

Hi All,

I have created a field carrier charges in sales line and in sales order sub form I added this field, when I am posting the item in sales order the carrier charges should come as item charges, the new line of item charges should be post in background while posting the item and I have written the code for adding the new line of item charges automatically for example

Now I have the first Line as ->Item in sales order before ship
After ship now I have the second Line as ->Charge (item) Then I want to invoice the item with item charges but it throw me the error like U must assign item charges if u want to invoice it

But I don't want to use the item charge assignment feature ,without using that feature it should get invoice

for that I have written the code like inserting the required fields in item charge assignment(Sales) table and by not using that feature the item get invoiced with item charges

But my problem is it didn't get updated in value entries and in posted sales invoice, G/L entry, tax entry I can able to see the second line of item charges

Please help me to post the item with item charges in value entries