>I'm going to guess that the MoBo was recently changed and that they
>left the original cables installed in the case. This same problem has
>come up numerous times over the last 2-3 months. Each motherboard
>has it's own unique pinout for the comm connectors on the board. This
>is due to the different design and layout characteristics for the board.
>The comm port will only work with the cable that was packaged with
>the motherboard.

Yeah, why didn't I throught of that. I used to know PS/2 mouse need
propertory cable, I didn't realize they did it to the serial mouse cable too!
Thanks