I have an install of SugarCRM that is version 5.0.0; the actual application resides on an Apache webserver and talks to another server hosting the database which in this case is SQL Server. When using the program I and other users are intermittently receiving error messages that essentially state an error while attempting to connect to the DB (sorry but don't have the actual message in front of me); the weird thing isn't the error but that clicking refresh button on the browser just resolves the issue. For example a user might try and log in to the app and receive the error and then click refresh on their browser only to find themselves logged into a valid session. Any thoughts? I looked at the broswers in question and had my networking people check the network. Again, the app by and large works fine; you can log in and add new data and make updates but its just on these odd occasions this error pops up.

The SQL Server instance is: SQL Server 2005 Express.
The OS on the server hosting the database is: Windows Server 2003 R2 Standard Edition
The OS on the web server is: Windows Server 2003 Enterprise Edition
The Appache version is: 2.2.4
w/ PHP 5.2.1
SugarCRM instance is 5.0.0 community.

The webserver resides on a physical blade and the database on a virtual machine. Both host other applications, are relatively stress free, and have operated without issues both physically and with regard to other applications (including DB dependencies).

Thanks to anyone and every one who looks. Let me know what additional information is needed for analysis.