How do I prevent a computer for changing associated AP

[chris_wanner]

I have 7 Lenovo AIO computers running Windows 8.1 with Intel Centrino 2230 wireless adapters. These units are public facing running a program that connects to a SQL database. If the connection to the database is interrupted, the program crashes. The units are within range of 2 different AP and every time they switch AP, the connection is interrupted. I set the WLAN to tunnel but this didn't help. I tried to use the Intel ProSet software to use a mandatory AP by MAC address but when I enter the MAC address of the AP, it can no longer connect to that AP. I have ZF7363 with a ZD1100 running 9.6.0.0.267. Any thoughts about settings to prevent the loss of connection to the DB?

[chris_wanner]

Thanks. That is what I have been working on. I was waiting until my test was done today to see if I got the settings right and so far, it is working very well.