AVG problem - please help

I have just changed from a wired network to a wireless network and now for
some reason I cannot update my AVG anti-virus software, it may have nothing
to do with switching to wireless network but I am not sure.

When I try to update, it finds the update that I need; in this case a
priority update, but it will not download it. When it tries to download it,
I get the following error message:-

"An error occurred when trying to connect to the server. The server name
cannot be converted to the IP address."

Has anyone else had this message? How can I fix it?

I hope you can help me.

I appreciate any help or information given.

Thanks!

Neil Hindry