Triggering SAMPLE_PROCESS_00002310

Hi,

I am trying to modify a copy of SAMPLE_PROCESS_00002310 in order to send a SapScript invoice from Tran MR90 through email. I need to change the email address from the standard KNB1-INAD to LFB1-INAD. I have coded the FM and put in a hard break-point. However wehn we run transaction MR90 the FM ZPROCESS_00002310 is not being called. We activated BTE 2310 and also attached the z fm. what else is required to trigger the FM?

I also activated enhancement RFKORIEX include  ZXFKOU01 but that code is also not being triggered?

Thanks,

Jim