Start-job not working as expected.

I'm writing a script using test-connection on many servers and want to use the start-job so that each instance runs seperate from the other. The following is the code I have, but the variables don't seem to pass into the job? Without the start-job everything works like a charm. Any help is appreciated! :)

$OurSvrs = get-content C:\Scripts\Monitor\Servers07012013.txt
foreach($Server in $OurSvrs)
{
start-job -scriptblock{
$Avg = 0
$PingServer = Test-Connection -count 5 $Server
$PingServer
$Avg = ($PingServer | Measure-Object ResponseTime -average)
$Calc = $Avg.Average
If ($Calc -lt 0.2)
{
$TnD = Get-Date
'Server ' + $Server + ' failed ping at ' + $TnD >> C:\Scripts\Monitor\PingMonitoring.log
}
}
}

Please mark my post as helpful or the answer or better yet.... both! :) Thanks!