Netvistat Flatpanel whit REDHAT 7.2

[AIX5L]

Hi Folks

I haved run Suse Linux 7.2 on my Netvista Box ( 2179 91G )
I have a proper Resolution in X11.

Now i haved installed Red Hat 7.2
I can not Configure a proper Resolution on my Flat Screen.
When i run xconfigurator no Selection will give me the good Configuration.

I have run XFree86 -configure an write a File Called XF86config.new in /etc/X11/
When i run XFree86, the Resolution is very nice.
But i can not start the X-Server.
I can only start the X-Server via ssh. on :0 and i have the noce Gnome-gui.

When i start the X-Server with my new XF86config.new File A Lot of Entries will not work ( Wrong Section ....)

Please Help me to Configure my Screen.
What is the Difference in XFree86-4 in RedHat to SuSe

Thanks Boys and Girls.