it was very long to connect to G100, sometimes it connect without problem but other times, Mach 3 was not able to connect to G100

it write this in alarm on mach3

G100 found
G100 rebooting, re-initialising
please wait....  G100 init....
G100 found
G100 rebooting, re-initialising
please wait....  G100 init....
......

I was try to réinstall mach 3(V3.041) , ré upload firmware, I was try other ethernet cable...
help me