Let me preface this by saying I am not an AE guy, I'm just learning it.
I see in my version of AE 10 (CS5 Master Collection) there are 3 options available for Export (swf, xfl, & Premier). And you can save as an XLM.
One of my students (I teach editing with FCP not AE) had an issue with exports in AE CS5. I did a little research and found that many export options were moved to Render Queue in the newest version of AE.
I couldn't find the exact link I looked at that day but this article mentions similar.
http://www.designertoday.com/Reviews/2010.Reviews/6647/Adobe.CS5.AfterEffects.as px
Towards the end of the article it states. "More changes include rendering and exporting such as removal of QuicktimeTime export from File>Export menu"
The OP seems to be trying to get his AE project into FCP. I thought this might help.
Am I missing something? Please do enlighten me. I'm not challenging, I'm asking.