Powershell in custom definition

Hi,

I am writing a custom definition to upgrade software but am having issues with power shell running something.  I am getting:

Command Interpreter running

Content filename: 'FsecureUninstall.ps1'

Writing script content to file 'C:\Windows\TEMP\FsecureUninstall.ps1' starting at line 5

Launching external script processor: <powershell.exe>

args: <-executionpolicy bypass C:\Windows\TEMP\FsecureUninstall.ps1>

External timeout: 60

returned: 259

Stdout:

Message returned from repair script was External application 'powershell.exe' returned 259 and provided no message

ERROR(RunVbScript) Failed to run command  - 80004005

DownloadPatch ERROR: Failed to run commands (80004005).

Last status: Failed

The powershell script is very simple:

EXTERNAL APPLICATION

exe=powershell.exe

args=-executionpolicy bypass %filename%

filename=FsecureUninstall.ps1

(Start-Process -FilePath "C:\Program Files (x86)\LANDesk\LDClient\sdmcache\ldlogon\patch\FsecureUninstallTool\UninstallationTool.exe" -ArgumentList "--noreboot --NOGUI" -Wait -Passthru -NoNewWindow)

It works on some hosts but not others.  I can't find anything on the (presumed error code) 259.  Anyone know if this is a LANDesk thing or a powershell thing?

Thanks,

Brad