in your networks settings file you need to specify the correct name for the services server.
/ns, /cs, /chanserv etc are secure aliases for /msg NickServ@ServerName and /msg ChanServ@ServerName to ensure that you never end up sending to a fake services client.
Whois NickServ, get the correct server name and place it in your networks settings file. Then rehash from command line or /rehash dynconf