WordAutomation Not Working When Published To IIS Webserver?

I am bulding a site that will create word documents from templates and fill in the bookmarks. Its working fine when running locally in VS but when I publish to the webserver it seems to have an issue opening word. Durning testing I created a new site that only has the code below and its still not working - you click on a button and it looks to have worked but word never opens. I have done 2 days of fault finding to no avail. The server has office 2003 installed and I have put the correct dlls in the bin folder of the project and still no joy - I have played around with as many settings as I can in IIS and still nothing.

[Code]....

I am using;

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using Microsoft.Office;
using Word = Microsoft.Office.Interop.Word;
using System.Reflection;