Returns enabled AD Object only using Get-ADObject ?

Hi All,

I wonder why the below script is not working to returns all active/enabled AD computers and Users object?

$filter = '
    (
        ObjectClass -eq "user" -or
        ObjectClass -eq "computer"
    ) -and 
    Enabled -eq $true -and 
    isRecycled -eq $false
Get-ADObject -Filter $filter

Thank you in advance.