ibm tp600x notebook serial is not working in QNX6.1

Hi there…
I’m qnx app. enginner.
I want develop arm target through serial port on x86 QNX host(tp600x
notebook), but serial on host(tp600x notebook) is not working.
All Serial driver(devc-xx…) in “/lib/dll” were used, but not working
How can I use serial port on qnx x86 host?
or Is there any compatible serial driver on qnx x86 host.

Serial is working in windows98 OS host.

please help me!!