AD Groups inside OD groups

Hi, I have the golden triangle setup working well with AD users inside OD groups. Workgroup Manager preferences work well on the OD groups and they apply to my AD users when they log in. In AD-OD-2.1.pdf it states that since 10.4.3, AD groups can be nested in OD groups. I am having trouble making this work correctly. They just don't apply. If I hold down option when logging in it says there are no groups. As soon as I put the AD user directly in the OD group it works great. What am I missing here? My AD group is a Global Security Group. I am running 10.4.5 on both server and client.