multiple display adapters lockup

system 2 ati 5450's, lucid
if i enable the second adapter by
aticonfig --adapter=all --initial
system locks up on reboot

i can individually enable either display but both together=crash,

Note a multiseat setup using same system doesn't work either only one display works at a time.

ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: fglrx 2:8.721-0ubuntu5
ProcVersionSignature: Ubuntu 2.6.32-17.26-generic 2.6.32.10+drm33.1
Uname: Linux 2.6.32-17-generic x86_64
NonfreeKernelModules: fglrx
Architecture: amd64
Date: Sun Mar 28 22:18:35 2010
DkmsStatus:
 fglrx, 8.721, 2.6.32-17-generic, x86_64: installed
 fglrx, 8.721, 2.6.32-16-generic, x86_64: installed
GdmLog:

InstallationMedia: Error: [Errno 13] Permission denied: '/var/log/installer/media-info'
MachineType: BIOSTAR Group TA790GX A2+
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.32-17-generic root=UUID=96d41c48-3a65-4fcf-9c9c-b731eb42588d ro quiet splash
ProcEnviron:
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: fglrx-installer
XorgLogOld:

dmi.bios.date: 08/04/2009
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 080014
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: TA790GX A2+
dmi.board.vendor: BIOSTAR Group
dmi.chassis.asset.tag: None
dmi.chassis.type: 3
dmi.chassis.vendor: BIOSTAR Group
dmi.chassis.version: 6.0
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr080014:bd08/04/2009:svnBIOSTARGroup:pnTA790GXA2+:pvr:rvnBIOSTARGroup:rnTA790GXA2+:rvr:cvnBIOSTARGroup:ct3:cvr6.0:
dmi.product.name: TA790GX A2+
dmi.sys.vendor: BIOSTAR Group
glxinfo: Error: [Errno 2] No such file or directory
system:
 distro: Ubuntu
 codename: lucid
 architecture: x86_64
 kernel: 2.6.32-17-generic