If a Reminder is not printing, there could be several reasons so you will want to check the following:

1.  Make sure the parameters you are using when printing Reminders are not excluding it (recent payment received, recent bill, etc.).

2.  Make sure there are no unposted Payments, Credits, Write Offs, or Invoices for the Client-Matter.

3.  Make sure the Client-Matter is Selected for billing.

4.  Make sure the Client-Matter is set to one of the Fee Arrangements and Billing Cycles you have chosen.

5.  Go into File Maintenance and open the Client record for the Client-Matter.  Access the Bill Delivery Tab and check to make sure the Reminder Statement Style is NOT set to None and the Client is not set to Client Level Billing.