You do NOT want to rerun configwizard. It won't help you with a dns or routing problem. Configwizard is only for getting a sequence number for telnetpro.
If your unix server address is 192.168.0.121 and you cannot connect to that then it appears that your problem is with routing. There isn't really anything I can help you with on that front. You will have to get a network administrator or consultant to fix that.