Hi,
How did you install the Replication Server?
In combination with the SAP Business Suite you need to use the SAP installer sapinst. If you do this then the Replication Server licenses will automatically be installed and with the Business Suite it's also free of charge.
Judging by the fact that you were asked for a licenses I assume you did it manually? In that case we would not support the setup.
Please have a look at SAP Note
2045365 - SYB DR - Where to find documentation about Disaster Recovery Setup with SAP Replication Server
Regards,
Joachim