Restore Device Configuration to Factory Defaults

I have a Digi Connect Wi-ME device without JTAG interface.
In the past I restored device configuration to factory defaults in hardware by pulling low the pin 20(/INIT or soft reset)until I saw a 1-5-1 blinking.
After I updated the firmware (first the POST 82000941_H and then the EOS 82000977_J) I can’t restore in the same way my device.I can still see the 1-5-1 blinking but nothing happens.The device keeps its settings like nothing happens.
Any idea will help

P.S Sorry about my english