Thanks for your feedback and sorry for the inconvenience this might have caused. There are many factors that cause the disconnection. And in most cases the disconnection is caused by unstable network.
If you are using Windows, you may click the Start button and enter "cmd" into the Search field. If the IP address displayed on AirDroid app is 192.168.xx.xxx, then you can type
ping 192.168.xx.xxx -t and press enter to see your ping output. And you may refer to the guide here for other OS:
http://www.wikihow.com/Ping-an-IP-Address
The ping output can somewhat let you understand the status of your network, though not that accurate. If the ping output isn't ideal, then we advice you to ask for help form network admin.
Or you may try again in another network environment to see if the issue remains.