Error calling function;

Hi I have a requirement to connect to sql server and do various operations currently doing it through start-job but we find it very inefficient. Someone pointed to Runspace and this link.
http://powertoe.wordpress.com/2012/05/03/foreach-parallel/

But in my script i have something like this.

It works fine if i pass only one variable to function ForEach-Parallel like this.

$SQLServers= Get-Content "L:\cfg\tst2.cfg"
$SQLServers |ForEach-Parallel -MaxThreads 100{  

# Start MAIN #
...declarations..
then

try {
    $var=$_  

    connect to sql server --Then do some processing

   }

  catch
  {
$Error[0]
  }
  }#End 

  But If i have something like this it throws an error saying cannot index into a null array , any way to fix it ? I might have to pass multiple parameters.

  $SQLServers= Get-Content "L:\cfg\tst2.cfg"
  $Database ="DBADB"
  $email = "dba@testemail.com"
  $Parms =@()
  $Parms = @($SQLServers,$Database,$email)
$Parms |ForEach-Parallel -MaxThreads 100{  

# Start MAIN #
...declarations..


try {
    $var1=$parms[0]
$var2=$parms[1]
$var3=$parms[2]
---Then do some processing
   }

  catch
  {
$Error[0]
  }
  }#End 
  I need to pass various inputs to my script then call the ForEach-Parallel function, any way around this?

Thanks