Powershell and Outlook 2007, trying to delete messages in a folder older than date

Question

I was hoping to get a powershell script that would do the following
1) Connect to outlook 2007
2) Go to Mailbox folder (not an inbox subfolder) called 'Processes'
3) Delete all email from that folder older than 3 days old
I did some searching, I have found very useful things like how to empty a deleted items folder.  I can even display all messages in that folder using this script snippet.  But whenever I try to filter it down to email older than 3 days old, it blows up on me.  I was attempting to use a | Where-Object pipe to reduce it and there are thousands of messages in that folder.
$outlook = New-Object -ComObject Outlook.Application
$olFolderInbox=6
$n = $outlook.GetNamespace("MAPI")
$f = $n.GetDefaultFolder($olFolderInbox)
$mailbox = $n.Folders.Item($f.Parent.Name)
$folder = $Mailbox.Folders.Item("Processes")
$folder.Items
#Clean out any open connections
$outlook = $n = $f = $mailbox = $folder = $null;

Answer 1

I thought I might offer another solution for this.  I came across this post looking to do the same, but I found it didn't always delete messages.  Based on some other information on another site I was able to come up with a modified version.
The two other sites I referenced were:
http://gallery.technet.microsoft.com/ScriptCenter/en-us/966637b9-0b70-41c0-99d0-4647a89da70a
http://msdn.microsoft.com/en-us/library/bb220369%28office.12%29.aspx
----Script----
#Name of folder to access.  You can specify subfolders by using FolderName\Subfolder
$folderPath = "FolderName"
#Filter older than 7 days
$olderThan = (get-date).AddDays(-7)
#Set format of date to use
$dateFormat = "g" # This will base on time to do just date choose "M/dd/yyyy"
#Create filter
$sFilter = "[LastModificationTime] < `'$($olderThan.tostring($dateFormat))`'"
$outlook = New-Object -ComObject Outlook.Application
$olFolderInbox=6
$n = $outlook.GetNamespace("MAPI")
$f = $n.GetDefaultFolder($olFolderInbox)
$mailbox = $n.Folders.Item($f.Parent.Name)
$folders = $mailbox.Folders
#Navigate to the proper folder
foreach ($folderName in $folderPath.split("\"))
  $folder = $folders.Item($folderName)
  $folders = $folder.Folders
$Items=$folder.items
$FilteredItems = $Items.Restrict($sFilter)
for ($i = $FilteredItems.Count; $i -gt 0; $i--) {
    Write-Host "Deleting $($FilteredItems.Item($i).Subject)"
    $FilteredItems.Item($i).Delete()
#Clean out any open connections
$outlook = $n = $f = $mailbox = $folder = $folders = $Items = $FilteredItems = $null;