I'm running QB 2006 premier. I've seen a few posts on this topic but so far no solution that seems to work. We have a gigabit unmanaged switched backbone with only a dozen users. No application on any pc gives any problems but one PC with qb times out. No other apps on that PC ever time out or have any issues.
Things I've done - replaced the network card replaced the network cable applied all the patches that autodownload for QB 2006 I've run the verify utility on the database
It does not seem specific to one database.