I will get my head around Linux

Okay checking the logs last night and I noted that ClamAV was'nt updating, so went through and checked all my settings for "Server Mode Only". Did the internet test and that passed fine.
So dropped into a shell and did "ping db.local.clamav.net" and got a positve response.
So then issued the command "freshclam" and got the following response:-
ClamAV update process started at Fri Jan 15 09:29:14 2010
2010-01-15 09:29:39.991587500 WARNING: Can't query current.cvd.clamav.net
2010-01-15 09:29:39.991591500 WARNING: Invalid DNS reply. Falling back to HTTP mode.
2010-01-15 09:29:39.993424500 Reading CVD header (main.cvd): OK (IMS)
2010-01-15 09:29:40.222258500 main.cvd is up to date (version: 51, sigs: 545035, f-level: 42, builder: sven)
2010-01-15 09:29:40.222346500 Reading CVD header (daily.cvd): OK (IMS)
2010-01-15 09:29:40.349069500 daily.cvd is up to date (version: 10302, sigs: 154278, f-level: 44, builder: guitar)
2010-01-15 10:29:41.106638500 Received signal: wake up
Just a bit concerned about these WARNINGS. Where am I going wrong???
Software installer shows everything is up to date.
Thanks
Graeme