How to remove attachment from followup email!!

Hi All,

I need quick help.I am trying to delete an attachment from the email created as a follow up doc from a complaint.

I am using object BT126h_MAIL in which i tried to write the code in COPY_ATTACHMENTS_ONFOLLOWUP method

through implementation class using implicit enhancement and sucessfully called cl_crm_documents=>delete method

and i am able to delete the attachment but when i try using it first time it is not deleting the attachment but when i execute the same

for second time it sucesfully deletes.

Plz let me know how should i go about.

Thanks