[AccessD] Way OT SQL Server/IIS permissions

Folks,

This is way OT but I know there are some very knowledgeable SQL server folks
on this list.  Here is my problem (the main one today anyway). I have a web
application which I built for an organization I belong to.  I built it in
ASP.NET thinking that this would be a good chance to actually build
something in it.  The app. development went well.  Used VS2005 with SQL
Server 2005 express. Everything runs under the development server so, before
moving to the host I tried testing under IIS on my machine.  I keep getting
an error on the opening page:

"[SqlException (0x80131904): User does not have permission to perform this
action.]".  

The error occurs on the open connection command so it is way before any of
the site roles and permissions come into play. I have permissions set in SQL
Server for IIS and ASPNET.  There must be something else to set but my
knowledge of sql server security is minimal so don't know where to look.
 
Any suggestions you can give would be greatly appreciated.  I am really
sorry now that I just didn't go with what I know and use an access database
with ASP pages.  They work, are relatively easy to code and I know how to
trouble shoot them.  This learning thing is way too much trouble and time.

Thanks for any suggestions.

Doug