Sorry I slightly misled you - when I said old version I did not mean another Outlook version. Both versions are Outlook 2003, but when I open Outlook on the laptop, through the network, it is not the same collection of emails, calendar and contacts information as stands on the Desktop. I had assumed that they would hold the same information and update each other as I opened one or the other i.e. they were in sync. Perhaps that is not possible without Microsoft Exchange.

I think I have resolved the Firewall issue. It looks as if both main and client computers have to conatin the inforamtion on Trusted Sites (i.e my home network). Symantec only mention the main PC - ah well!

Really grateful for all your time and effort on this.

Gareth