After you did the P2V, did you remove the old hidden devices in Device Manager? If not, try:
In CMD, type “set devmgr_show_nonpresent_devices=1″ hit enter
Type “devmgmt.msc” hit enter
Device Manager will open, click View>Show Hidden devices
Now remove all the old physical hardware no longer present on the VM. Leave the RAS Async Adapter if it is still there.
Shutdown the VM, add the new NIC while it is off and boot up.
PS – Also make sure VMware Tools is installed on the VM.