As I posted, I tried to flash but no connection is established.
I tried the PC serial port and even bought a USB-RS232 adaptor and tried it too but with no connection.
The digi transport moudle is WR44-U5 and on its front panel there is the title: "Powered by Sarian systems".
1) Therefore, is it a digi transport or legacy Sarian system router?
2) Since its the first time I'm flashing, Is there a specfic way of doing it? (I saw apost about DR64: http://www.digi.com/support/forum/37296/when-trying-reset-power-issue-indicator-flashing-same-time)