Got a 3845 router with a 3750 service-module in it at a remote site.  I was configuring the switch and must have entered the password wrong, now I cannot access the switch.  I am trying to enter rommon mode to change the password and I am having problems.  I force the switch to reboot with "service-module gi1/0 reload" command.  Then I wait for the "Interrupt within 5 seconds to abort boot process." line and send control break from the TerraTerm menu (have also tried Alt+B), but it will not interrupt the boot process.

Is it possible to get into rommon mode remotely?

Thanks for any help.