Powershell pass array of objects to another script

Hi,
Trying to pass an object array to another script as follows

script I'm calling script1.ps1

param(
    [Parameter(ValueFromPipeline = $true)]
    [object[]]$test,
    [string]$batch
)

$host.ui.RawUI.WindowTitle = "Processing batch $batch "
$test | Out-File C:\work\test2.txt -Append
start-sleep -seconds 5

exit

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-------------------------------------------------------------------------------------------------------


main script calling script above

function Invoke-Command() {
    param ( [string]$program = $(throw "Please specify a program" ),
            [string]$argumentString = "",
            [switch]$waitForExit )

    $psi = new-object "Diagnostics.ProcessStartInfo"
    $psi.FileName = $program 
    $psi.Arguments = $argumentString
    $proc = [Diagnostics.Process]::Start($psi)
    if ( $waitForExit ) {
        $proc.WaitForExit();
    }
}

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csv file --> test.csv

name,column1,column2,column3,column4
test,a,b,c,d
test1,e,f,g,h
test2,i,j,k,l

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$importedcsv = import-csv .\test.csv
$batch = 1
Invoke-Command -program "powershell.exe" -argumentString "C:\work\script1.ps1 @($importedcsv) $batch" -waitForExit

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the array param is not outputting to the file on the script script.ps1

Any help much appreciated....