How to delete a item level condition type by using FM SLS_LORD_MAINTAIN ?

Hi,

I have to delete discount related condition type (As per user decision) before saving the order. My Web dynpro component is copy of standard component LORD_MAINTAIN_COMP. I tried to access node level values of item conditions,but nodes are being empty. So that I'm trying to using FM SLS_LORD_MAINTAIN to update condition types. What all are the parameters has to be passed to this FM?.