I'm experiencing a similar problem.
When connectint to the overeo gumstix nothing happens. If I connect a scrren to the board I see the start up sequence but nothing is echoed back to the terminal.

This has worked which makes me wonder about the cables but they seem to fine when used for other peripherals , i.e. SD card adapter.

Any clues why this happens would be gratefullu apreciated.

Attaching my .kremrc file

Arngrimur Bjarnason

---- .kermrc file ------
set line /dev/ttyUSB0
set flow-control none
set carrier-watch off
set speed 115200
set reliable
set prefixing all
set file type bin
set rec pack 4096
set send pack 4096
set window 5
show communications