Vista - Trouble setting form value with IE COM Object

I'm trying to write a small script to login to the mobile Facebook site so
that I can mine the contact information from my friends (Facebook doesn't
have an export.) Unfortunately, whenever I run this script I get the error:

"Property 'value' cannot be found on this object; make sure it exists and is
settable.
At C:\Users\BigEyedDad\Documents\fbContacts.ps1:16 char:8
+ $email. <<<< value = "test""

Here's what I've got so far:

-------[ CODE ]-------

$ie = New-Object -COM InternetExplorer.Application
$ie.navigate("http://m.facebook.com")
$ie.visible = $true

start-sleep 5

#grab form elements for login
$email = $ie.document.getElementsByName("email")
$pass = $ie.document.getElementsByName("pass")
$button = $ie.document.getElementsByName("login")

start-sleep 1

#set values
$email.value = "test"

-------[ END CODE ]-------