>We have a client that is getting 1104/5 errors with 50 users hitting our system. We know that the server they are running is also running SQL Server with 2 database applications on it. Our system installed at their site is using native VFP tables through views.
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> I have been asked to gather some information on applications that are in a production environment - specifically, database size, number of users, network topology. Any comments on performance of the systems would be helpful.
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> It appears to us that they are overtaxing their server, and that our application is suffering as a result.

That sounds right. We had a similar problem at about that # users, that was traced to constant server McAfee AV scans. Disabling it solved the problem. But for your situation, a dedicated server might be the only solution, unless you can somehow adjust the foreground/priority features on the SQL Server to get it to stop hogging the server.