communication between two computers

I am new user to XBee and i don’t have that much of idea about it.
Any help would be appreciated.
I want to communicate two computers using XBee in between.
For now i have connected one module to a computer.
The problem which i am facing now is when i am pressing Test/Query button it is showing me that Modem type unknown and it does not display version number also.

please reply its kind of a urgent