>I'm about at my wits end on this.
>
>I'm working on an app that has a windows and web component, both of which access a SQL database on another system.
>
>I am using SQL authentication (name and password) for convinience and according to all the reading material this should be pretty simple.
>
>But when I am running the web side of things it always fails to connect. It give me a "SQL server does not exist or access is denied" error message. I'm using the exact same connection string that works just fine in the windows app.
>
>Everything I read says that using SQL authentication with web apps is straight forward, and I've done it in the past. I'm missing something but I have no idea what.

Probably from windows app you're actually using windows authentication (recommended) and not SQL authentication. Does that windows app connect if you do that from a nontrusted computer?
Cetin