Im having troubles applying my Second screeen to ubuntu, i recive the following error

The selected configuration for displays could not be applied
requested position/size for CRTC 148 is outside the allowed limit: position=(1280, 0), size=(1920, 1080), maximum=(1920, 1920)

Failed to apply configuration: %s
GDBus.Error:org.gtk.GDBus.UnmappedGError.Quark._gnome_2drr_2derror_2dquark.Code3: requested position/size for CRTC 148 is outside the allowed limit: position=(1280, 0), size=(1920, 1080), maximum=(1920, 1920)

My xort.conf is here: http://pastebin.com/dzgj2FEi
and my system specifications are as follows

os [Linux 3.2.0-29-generic-pae i686]
distro[Ubuntu "precise" 12.04]
cpu [4 x AMD Athlon(tm) II X4 640 Processor (AuthenticAMD) @ 800MHz]
memery [Physical: 11.8GB, 93.4% free] disk[Total: 206.5GB, 83.5% free]
video[ Advanced Micro Devices [AMD] nee ATI Barts XT [ATI Radeon HD 6800 Series]
sound [HDA-Intel - HDA ATI SB1: HDA-Intel - HD-Audio Generic]

I was told to follow the guider here : http://wiki.cchtml.com/index.php/Ubuntu_Oneiric_Installation_Guide#Generate_a_new_.2Fetc.2FX11.2Fxorg.conf_file
however it helped none, i've been trying to get this functioning on and off for about 3 days, any help would be GREATLY appreciated!