I managed to get the web client to work in TX mode. For this you have to use the Firefox Browser that allow you use the microphone.
The problem was that the power ouput it was always 0 watts. Yesterday, by chance, I discovered how to get power and the PA of lineal amplifier to work.
First you have to execute Expert Remote client in windows and activate PA buttom with RS Server running and Web server running and check that transmit and works. Then close the Expert remote client software and open the firefox Browser in your tabler or movil device and conect. Increase the power in the DSP menu and all work in TX without problem. You have to do this steps every time you start the RS server and web client. If you do not, you will not get power and PA do not work.
The only bad things is the quality of the modulation that sounds dull. It woukd need a small equalizer to be able to improve this. I have been doing a QSO wihout problem with my movil phone via remote. It's really fantastic. I have my radio station in my pocket.
EA5CCY - Pedro