If I understand what you're trying to enter correctly....Try this...

 Code:
$null = writevalue ("HKEY_LOCAL_MACHINE\SOFTWARE\Lightspeed Systems\SecurityAgent","Use Lightspeed","0","REG_DWORD")
$null = writevalue ("HKEY_LOCAL_MACHINE\SOFTWARE\Lightspeed Systems\SecurityAgent","TTC Server","ttp.pamplincorp.com","REG_MULTI_SZ")