Connecting NIC to distributed virtual port group

Hello,

We are running into an issue using Orchestrator 5.5 to when we try to reassign the network of a VM to a dv port group.  Our current process clones the vApp, then loops through each VM in order to change the network on each VM to a dvPortGroup.  We want to assign a port group to NIC 0 of each VM, and we are using the "Connect virtual machine NIC number to distributed virtual port group" workflow.  When we run the workflow, everything completes without error & the tasks in vCenter also show to complete successfully.  When we go into each VM to look at the network, it is unchanged.  Does anyone have any ideas on what could be causing the network to not get updated?

Thanks,

Dan