Welcome to the Community,
just as a quick reminder. For dynamic LACP you need vSphere 5.1 with vDS (vSphere Distributed Switches). Standard switches only support static EtherChannel (mode on), see http://kb.vmware.com/kb/1004048.
You may also want to read Demystifying LACP vs Static EtherChannel for vSphere via @ChrisWahl | Wahl Network
André