nslookup from behing router/modem

I have just replaced my USB modem with a router/modem and things seem to be working find on my Debian box behind the router, except for nslookup. Is there something I need to amend to get it to work. Note I can still access the e-World from my Debian box:

michael@manchester-campaigns:~$ ping www.bbc.co.uk

PING www.bbc.net.uk (212.58.224.116): 56 data bytes
64 bytes from 212.58.224.116: icmp_seq=0 ttl=248 time=36.4 ms
64 bytes from 212.58.224.116: icmp_seq=1 ttl=248 time=35.8 ms

• www.bbc.net.uk ping statistics --- 2 packets transmitted, 2 packets received, 0% packet loss round-trip min/avg/max = 35.8/36.1/36.4 ms

michael@manchester-campaigns:~$ nslookup www.bbc.co.uk ;; connection timed out; no servers could be reached

michael@manchester-campaigns:~$ less /etc/resolv.conf search
nameserver 158.152.1.58
nameserver 158.152.1.42

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