Digi AnywhereUSB/14 system status is red

Sorry for my English, it is rather bad!
We are using digi anywhereUSB\14 with last firmware and 4 hosts with last drivers 32 and 64 bit. Sometimes system status LED blinks red, we have to reboot it, after that it works normally for several hours. What we can do?

what type of USB device are connected to AUSB?
It is advisable to update the drivers of the dongle connected to AUSB (if it is the dongle connected to AUSB)