LACP is used in aggregate loadbalancing mode. It sounds like now you don't have LACP configured on the switchports properly.
An example Cisco configuration:
channel-group <#> mode active
See also this post: https://community.mcafee.com/thread/67228
Note that if you need urgent help and you have a support contract, I'd recommend calling to tech support: http://www.mcafee.com/us/about/contact-us.aspx#ht=tab-techsupport