I have a problem regarding web-service behaviour.
I have used web service behaviour in my application for Database
validation task of Client-codes.
in the same way as it is described in the code-projects article:-

http://www.codeproject.com/soap/WebServiceASPNET.asp

When I host the application on a server, It is working fine in a local
network,
but if i access the application remotely(i.e ouside the network) the
web service behaviour is throwing error as

Error: server unknown server error.

I am really get stuck in this problem.

Please, if any one has idea about that why is it happening, guide me.

Unknown Server Error is not enough of a description to let us help you.  For
starters, you may want to:
  1.. Open Internet Explorer and from the "Tools" menu select "Internet
Options"
  2.. Click on the "Advanced" tab.
  3.. Under the heading "Browsing" make sure that the "Show friendly HTTP
error messages" option is un-checked.
This should give you a more descriptive error message if you refresh the
page.

Hope this helps,

Steve