XFree86-4 config issue

[digish reshamwala]

Hi,

I installed FreeBSD 5.2.1 using by creating my own installation CD from the 
freeBSD5.2.1_disc1.iso image from the main ftp site for i386 system.

Now, I am having trouble configuring XFree86-4, and:

After building the X11 by using following commands-  as root user

# cd /usr/ports/x11/XFree86-4
# make install clean

When I tried to configure it using:

# XFree86 -configure

It gives me following error message-  (i.e the XFree86.0.log file exculding 
comments)

"
Fatal Server error:
xf86EnableIO: Failed to open /dev/io for extended io
"

Please help me out to solve this problem

thanks
macuser