Dual monitors in Xfce4 fedora 20

[jarmo]

Struggling with adding another monitor. With Arandr I can set both
monitors working so, that I can drag programs ffrom monitor to another.
BUT, monitors are in wrong order. I have DVI-0 and VGA-0, from same card

VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] RV370
[Radeon X300]

xrandr -q
Screen 0: minimum 320 x 200, current 1280 x 1024, maximum 4096 x 4096
VGA-0 connected 1280x1024+0+0 (normal left inverted right x axis y axis) 338mm x 270mm
   1280x1024     60.02*+  75.02    72.05  
   1152x864      75.00  
   1024x768      75.08    70.07    60.00  
   832x624       74.55  
   800x600       72.19    75.00    60.32    56.25  
   640x480       75.00    72.81    66.67    60.00  
   720x400       70.08  
DVI-0 connected 1280x1024+0+0 (normal left inverted right x axis y axis) 376mm x 301mm
   1280x1024     60.02*+  75.02    72.05  
   1152x864      75.00  
   1024x768      75.08    70.07    60.00  
   832x624       74.55  
   800x600       72.19    75.00    60.32    56.25  
   640x480       75.00    72.81    66.67    60.00  
   720x400       70.08  
S-video disconnected (normal left inverted right x axis y axis)

xrandr --output VGA0 --right-of DVI-0
warning: output VGA0 not found; ignoring

As said, I can make these monitors working with ARANDR, but when opning
xfce4 again, have to configure monitors again.

Tried to configure xorg.conf, no worky...

Xorg :1 -configure

X.Org X Server 1.14.4
Release Date: 2013-10-31
X Protocol Version 11, Revision 0
Build Operating System:  3.14.3-200.fc20.x86_64 
Current Operating System: Linux oh1mrr.ampr.org 3.16.2-201.fc20.i686+PAE #1 SMP Mon Sep 15 20:10:13 UTC 2014 i686
Kernel command line: BOOT_IMAGE=/boot/vmlinuz-3.16.2-201.fc20.i686+PAE root=UUID=73d8e52e-eabd-485b-a4f9-53b8388ca52d ro LANG=fi_FI.UTF-8 rd.md=0 rd.lvm=0 rd.dm=0 quiet SYSFONT=lat0-16 KEYTABLE=fi-latin1 plymouth.enable=0 rhgb rd.luks=0 SYSFONTACM=iso15
Build Date: 27 June 2014  01:35:49AM
Build ID: xorg-x11-server 1.14.4-11.fc20 
Current version of pixman: 0.30.0
        Before reporting problems, check http://wiki.x.org
        to make sure that you have the latest version.
Markers: (--) probed, (**) from config file, (==) default setting,
        (++) from command line, (!!) notice, (II) informational,
        (WW) warning, (EE) error, (NI) not implemented, (??) unknown.
(==) Log file: "/var/log/Xorg.1.log", Time: Wed Sep 24 21:14:28 2014
setversion 1.4 failed
List of video drivers:
        nouveau
        r128
        sis
        v4l
        apm
        ztv
        siliconmotion
        glint
        geode
        i740
        amd
        tdfx
        neomagic
        trident
        modesetting
        s3virge
        sisusb
        cirrus
        mach64
        rendition
        mga
        savage
        i128
        radeon
        openchrome
        ati
        voodoo
        dummy
        intel
        qxl
        vmware
        vesa
        fbdev
(++) Using config file: "/root/xorg.conf.new"
(==) Using config directory: "/etc/X11/xorg.conf.d"
(==) Using system config directory "/usr/share/X11/xorg.conf.d"
(II) [KMS] Kernel modesetting enabled.
Number of created screens does not match number of detected devices.
  Configuration failed.
(EE) Server terminated with error (2). Closing log file.

Googled much, but didn't found any help... Many people with different
distros same troubles, no solution.

Anybody experienced with this?

Jarmo