"Can't find server name" Error in nslookup

[LourdesT at aol.com]

When I use nslookup, I get error message "Can't find server name for address 
192.168.1.50; server failed" and shows default server as localhost and 
address as 127.0.0.1.  I am running BIND 8.2.2p5 on Solaris 2.7.  If anyone 
has experience in troubleshooting this message, please let me know which 
config file(s) I need to re-examine.  I've configured resolv.conf as follows:

nameserver 192.168.1.50
nameserver 127.0.0.1
domainname invest.jlic.com

I didn't modify nsswitch.conf and just used the existing nsswitch.conf in 
/etc.

Thanks.