Error (301): I/O Error: Connection reset

When I open a project in FactoryPMI from any client, the following message shows in a popup window:
“ERROR (301) SQL error for” SELECT (getdate ()): I / O Error: Connection reset "

This same error appears for any other SQL query.

I can close the popup window, but some time later reappears.

We have the following architecture:

A WEB server (Windows Server 2003) access to a separate server database to SQL SERVER 2005.

Any idea?

This is a problem between the FactoryPMI Gateway and the database. Perhaps the database is overloaded, or maybe there is a faulty bit of networking between them?