[USR-TC] Netserver configuration HELP.

I'm trying to configure my NetServer and NMC board in USR-TC. I don't have the console cable that comes with the device. I'm using a null-modem cable and the com port adapter I use for my Cisco router. when I run HyperTerminal with 9600,1,8,n,1,hardware I can't get connected to neither of the board but while cable is connected if I reboot the box (USR-TC) I see the login prompt on hyperterminal session for the NetServer or NMC but I can't type anything to login as !root I reset the board (switch#5) but still is the same . Any clue? please Fred