Change SQL Agent Job notification operator

Need help with this powershell script that will assign operator email for failure.  Here is what I have:

$server = "SQLSERVER\NAMED_INSTANCE"
[System.Reflection.Assembly]::LoadWithPartialName("Microsoft.SqlServer.SMO") | out-null;
$srv = new-object Microsoft.SqlServer.Management.Smo.Server ($server)
foreach ($job in $srv.JobServer.jobs)
{
$job.EmailLevel = [Microsoft.SqlServer.Management.Smo.Agent.CompletionAction]::OnFailure
$job.OperatorToEmail = "SQLADMINS"
}