You might need to give the ASP.Net worker process user rights to interact with the desktop. I experienced a similar problem with a different product that worked fine locally because it ran under my privileges and choked once deployed.
You should be able to replicate the problem locally by setting up your app in IIS on your machine and then you can test the solution to see if it works for you.
stiletto
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Re: using Microsoft.Office.Interop.Word on ASP.NET server starts process, but hangs
Apr 26, 2008 02:34 AM|LINK
You might need to give the ASP.Net worker process user rights to interact with the desktop. I experienced a similar problem with a different product that worked fine locally because it ran under my privileges and choked once deployed.
You should be able to replicate the problem locally by setting up your app in IIS on your machine and then you can test the solution to see if it works for you.