Checked the voicemail ports. This is the Flash Based Voicemail by the way. Anyway I checked the following on all the voicemail extensions.
Conference = Enabled
System Speed Dial = Enabled
Call Forward = Enabled
Line Group Access = group 1 enabled.
All the settings were enabled already. I didn't change anything.
conference/disa timer I changed from 10 to 60.
When the call is transferred by the Auto Attendant to the extension I was watching to see if one of the trunk buttons lights, other than the one I was on. It doesn't.