Update Services

If you have added URIs to options>writting>update services, when you save of publish and entry are you supposed to “see” the pings, like with mt.
I am pretty sure that update services is not working for me and I am trying to work out why.
Am I missing a check box somewhere?
Running wp 1.2
URIs added:
http://rpc.pingomatic.com/
http://www.bloghosts.com/ping.php? site=davidblog.ws
Dave