Sonar X3 - combine multiple midi clips into one midi clip

I used Comp recording mode to create a midi comp track.  So the track has about 20 small midi clips.  I flattened to a comp take.  That worked ok (the first time anyway).  Then I wanted to change the first 12 bars so I recorded another 6 takes over that region.  I cut the takes into 2 clips and isolated the ones I wanted.  Ok.  So the comp sounds great at the track level.
 
So I try to flatten to another comp take.  No workie.  The resultant (2nd) comp take lane doesn't even have a clip in it.  Nada.  No midi notes.  No output.   I spend an hour playing with stuff trying to get this to work.  No way, Jose.
 
So I create another instrument track with a different soft synth.  I ctrl+shift+click/drag the first tracks composite midi content down to the new instrument track.  OK.  Now I have the midi notes I want in one track, without all the "fragile-ness" of the multiple takes and comp stuff.
 
BUT I have 20 separate midi clips in my new instrument track.  I want one.
 
How can I combine multiple midi clips in a track into one clip?  (They are adjacent and contiguous.)
 
(Bounce to Clip(s) isn't enabled when I have all the clips selected...)
 
Thanks!
Keith
 

Clip lock was the problem.  Thanks!
 
So the new comp take lane is locked.  I need to do some piano roll work to tighten things up.  Is it "best practice" to unlock the comp take lane and party on those midi notes?  Or copy the clip to a new track and edit that copy?  (I'm just never sure about the comp track.  Lots of moving parts with all the take lanes, mute/solo rules, locked takes, etc.  Plus it seems really easy to accidentally isolate an unwanted clip and hence "mysteriously" lose a lot of work.)
 
Suggestions?
 
Thanks
Keith