Jon,
You make a valid point. I am afraid that even with a dedicated server, I may still have this problem as, I will still be running wireless.
To clarify, the client computer usually goes into sleep mode at night, and it appears that after a lengthy "sleep" period (ie until the next morning or after the weekend) it loses the AC database connection. However, if I put the computer to sleep and quickly wake it up, it somehow retains the connection.
Also could you tell me more about your network set-up?
Thanks