trusted user ...?

Hi, I am quite new to Informix. I have created learn_online database like suggested in the manuals. It works fine. Now, I have another db called isp. I just patched a little the original config file, but now I get the following from server: 10:17:16 listener-thread: err = -956: Client host or user (informix@luke.fe.uni-lj.si) is not trusted by the server. Informix is the very same user that runs learn_online database too, where everything is ok. There is no ~/.rhosts, /etc/hosts.equiv and no remote clients. Everything is local. Even databases are empty! Regards, Zdravko.