Hello gaojun,
Which version of the RLM license server are you using? If you use the RLM license server download from Ziva web store, it shouldn't prompt this message.
This message will show in newer RLM license server, which ask for setting up the user name and password to access the admin web page. Please refer to page 50, 51 in the RLM License Administration manual for details.
Regards,
Chengdong