well, let me tell you my little story.
Before this weekend I have tested successfully my little PCserver - Tabletclient application on my work, connections established well and the the whole application workes well a couple of times in real life conditions...
During the weekend, I decided to upgrade the B4A version. On Monday's work test, was impossible to establish the PC-Tablet wi-fi connection without been able to explain the reason. The clerk said that have changed nothing on his desk and router configuration. I returned back and tested on my home network, all things went fine! My security options on my home network was WPA while at work's network was WPA/WPA2 PSK. I thought that this was the problem, but the clerk still insists that nothing has changed, and the application, before the weekend, was working properly on the same router settings, that is, WPA/WPA2 PSK. Anyway, today I went on my work, changed the router security settings to WPA but still no luck. In all situations all the machines (PC, tablets, phones) were always able to connect on the work's Wi-Fi network. Finally, I did it work but without any encryption. Could you think any reason beyond the case of something happened wrong with the upgrade from 3.8 to 4? I have the ESET security and whenever there is a connection request, I would be able to check the connection and allow it. During the problems described has never get any request from tabletclient to PCserver.
Regards,
mike b