vds lacp support via powerclie

hi Guys

Im trying to create a new object in order to give my vds lacp support and create lags etc via command line

Im not having any luck  - any ideas ? 

#Connect to vCenter

Write-Verbose "Connecting to vCenter"

$server = Connect-VIServer $vCenter -credential $(get-credential)

$s = Get-VDSwitch $VDS

$vds_view = get-view $s.id

$dvsconfig = New-Object VimApi_55.VMwareDVSFeatureCapability

$dvsconfig.lacpCapability = New-Object VMware.Vim.VMwareDvsLacpCapability

$dvsconfig.lacpCapability.lacpSupported = 'true'

$vds_view.UpdateDvsCapability($dvsconfig)

Thanks