Dunning Letter Reminder mails - subject error

Hi All,

We are using the standard reminders for vendor-based long-term vendor declarations. We set 3 dunning levels, in order to receive a remainder mail with the PDF attachment in it every day (the first 3 days after the original NAFTA MEMORANDUM mail).

The PDF attached that we are receiveing from each of the 3 reminders are ok...each of those mention that they are either the first, second or third reminder...but the problem is with the subject of the e-mail that is sent. Each of those 3 reminders are being sent with the same subject: "FIRST FOLLOW UP DUNNING LETTER".

Where can I check where is that subject set? We need to receive a SECONF FOLLOW UP... and THIRD in the last 2 mails that are sent the last 2 days.

Please let me know if you have a clue of how I need to find that.

We are using the t-code /SAPSLL/PREVDI_12 for launching the reminders.

Thanks in advance!!!

Matias