Unable to connect with TinyG

I want to try Laserweb but I’m unable to connect with the laserweb frontend.
Im receiving the following from the interface
Connecting Machine @ USB,COM4,115200baud Machine connected No supported firmware detected.
Closing port COM4 Machine disconnected`

I don’t know what i’m doing wrong, please help

The TinyG is working well becuse, I can connect with Chilipeppr or with a terminal emulation program lie CoolTerm.
JSON communication is enable