help with X server configuration

[P.S. Kebbeh]

I have installed FreeBSD in my computer i386 and have reach the final stage 
of configuration for the x server, but after confirming to load

"xf86cfg fully graphical xfree86 configuration tool"

I was prompted with an error message "out of frequency range H:74.9KHz 
V:59.9Hz"

Can anybody help please.

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