hey everyone

I am trying to get an external monitor (Dell M781p) connected to my compaq presario 2500. When I run xinit with the monitor connected, my LCD is fine, and the monitor comes up with some white vertical lines that flash alot, and a lot more random flashing stuff. its really hard to explain, but I am sure some of you know what it looks like. X (or windowmaker, im not sure which one it is) knows that the other monitor is there, and maximizes windows across both monitors, although you cant see the window on the CRT.
Anyone know how to fix this? Also, I would like to have a single workspace spread across both monitors, but maximized windows only fill one monitor. This isnt a big deal, but is it possible?

Thanks

XF86Config (although I am using xorg):


Section "ServerLayout"
Identifier "Default Layout"
Screen 0 "Screen0" 0 0
Screen 1 "Screen1" RightOf "Screen0"
InputDevice "Mouse0" "CorePointer"
InputDevice "Keyboard0" "CoreKeyboard"
InputDevice "DevInputMice" "AlwaysCore"
Option "Xinerama" "On"
EndSection

Section "ServerFlags"
Option "Xinerama"
EndSection

Section "Files"
RgbPath "/usr/X11R6/lib/X11/rgb"
# FontPath "unix/:7100"
EndSection

Section "Module"
Load "GLcore"
Load "dbe"
Load "extmod"
Load "fbdevhw"
Load "glx"
Load "dri"
Load "record"
Load "freetype"
Load "type1"
Load "synaptics"
EndSection

Section "InputDevice"
Identifier "Keyboard0"
Driver "keyboard"

Option "XkbModel" "pc105"
Option "XkbLayout" "us"
EndSection

Section "InputDevice"
Identifier "Mouse0"
Driver "synaptics"
Option "Device" "/dev/psaux"
Option "Protocol" "auto-dev"
Option "LeftEdge" "1900"
Option "RightEdge" "5400"
Option "TopEdge" "1900"
Option "BottomEdge" "4000"
Option "FingerLow" "25"
Option "FingerHigh" "30"
Option "MaxTapTime" "180"
Option "MaxTapMove" "220"
Option "VertScrollDelta" "100"
Option "MinSpeed" "0.02"
Option "MaxSpeed" "0.25"
Option "AccelFactor" "0.0012"
Option "SHMConfig" "on"
Option "Emulate3Buttons" "yes"
EndSection


Section "InputDevice"

# If the normal CorePointer mouse is not a USB mouse then
# this input device can be used in AlwaysCore mode to let you
# also use USB mice at the same time.
Identifier "DevInputMice"
Driver "mouse"
Option "Protocol" "IMPS/2"
Option "Device" "/dev/input/mice"
Option "ZAxisMapping" "4 5"
Option "Emulate3Buttons" "yes"
EndSection

Section "Monitor"
Identifier "Monitor0"
VendorName "Monitor Vendor"
ModelName "Unknown monitor"
HorizSync 31.5 - 90.0
VertRefresh 59.0 - 75.0
Option "dpms"
EndSection

Section "Monitor"
Identifier "Monitor1"
VendorName "Monitor Vendor"
ModelName "Unknown monitor"
HorizSync 30.0 - 85.0
VertRefresh 50.0 - 160.0
Option "DPMS"
EndSection

Section "Device"
Identifier "Videocard0"
Driver "radeon"
VendorName "ATI"
BoardName "Radeon Mobility U2"
VideoRam 65536
BusID "PCI:1:5:0"
Option "AGPMode" "4"
Option "DPMS"
Option "AGPFastWrite" "On"
Option "EnablePageFlip" "On"
Option "CloneMode" "0"
EndSection

Section "Device"
Identifier "Videocard1"
Driver "radeon"
VendorName "ATI"
BoardName "Radeon Mobility U2"
VideoRam 65536
BusID "PCI:1:5:0"
Option "AGPMode" "4"
Option "DPMS"
#Option "AGPFastWrite" "On"
#Option "EnablePageFlip" "On"
#Option "CloneMode" "0"
Screen 1
EndSection

Section "Screen"
Identifier "Screen0"
Device "Videocard0"
Monitor "Monitor0"
DefaultDepth 24
SubSection "Display"
Depth 16
Modes "1400x1050" "1024x768" "800x600"
EndSubSection
SubSection "Display"
Depth 24
Modes "1400x1050" "1024x768" "800x600"
EndSubSection
SubSection "Display"
Depth 32
Modes "1400x1050" "1024x768" "800x600"
EndSubSection
EndSection

Section "Screen"
Identifier "Screen1"
Device "Videocard1"
Monitor "Monitor1"
DefaultDepth 24
SubSection "Display"
Depth 16
Modes "1024x768" "800x600"
EndSubSection
SubSection "Display"
Depth 24
Modes "1024x768" "800x600"
EndSubSection
SubSection "Display"
Depth 32
Modes "1024x768" "800x600"
EndSubSection
EndSection

Section "DRI"
Group 0
Mode 0666
EndSection