1. How have you setup the "Device Mapper"? Make sure you map the panic button signal to a suitable GpsGate Variable. e.g. to "SOS".
2. Have you setup any Event Rules?
The best way to trouble shoot tracker to server communication is by using the Terminal. More info about the Terminal here:
In the Terminal you will see how GpsGate processes your data. Which variables are mapped, and which events are started and ended etc.