Connection serial between 2 handled devices

[citti]

Hello

For one of my projects I must make a connection between two Handled PC (both have windows CE) using the serial cable in order to for exemple copy a file from one to the other one

For my test, I tryed with un PC(with XP) and a handled PC(with CE):

from windows CE to XP , there are no problem but

from XP to CE that do not work

if someone has a idea I will be very happy

thank you

David