Need Help! mach3 mill+galil

please help me now
galil communication error

Problem I want to help fix it.
I run g code for mach3 mill about 2 hours
mach 3 software will stop working and the alarm.
* "galil communication error" and the orange LED is on Broad galil it turn off.
.........................................
History status.
LastErrors: a timeout occurred while waiting for response from control.
Before the galil communication error.


thank you