cannot open a file over my network

[Stephen Constantinou]

Dear All

I have a network of two computers behind a Smoothwall firewall.  One is
an ethernet connection to a switch the other is a wireless connection to
a wireless/4 port router set up as an access point connected to the switch.

The ethernet computer is an XP and the wireless connection is a Ubuntu
8.1 laptop that I have recently installed a load of updates for.  136 in
fact.

I like to sit downstairs and open and work on files on the upstairs
computer by using Konqueror to locate the file (Network folders > Samba
Shares > Mdkgroup > then browse to the file) and click it.  The file is
opened in OpenOffice and I can save it as I go along.

Since this update of packages, I am not able to do his.  After I click
  the file the OO splash screen starts but does not continue to open OO
or the file.  No application opens and no error messages occur.

I have tried looking through the installed packages but I cannot
identify any one package that might have done this.

I look at System Settings > Sharing > File Sharing which is set to
Simple Sharing.

I am at a loss to know what I did and what I can do to solve it.

Any help appreciated

Stephen