Premiere Wont Add AE Comp to Timeline

Ok so I have some footage at 1920 x 1080p AVCHD; this is imported into Premiere Pro.  I have then edited the footage, simple cuts, no effects.

I have then gone into After Effects and used Dynamic Link to import the Premiere Sequence, in After Effects I have created a composition from the sequence.

I have then turned the sequence into a 3D layer and used a camera to give a camera shake feel; then I put that composition into a new composition which is resized and has some colour correction applied.

I am now trying to import that second composition back into Premiere, which as I say imports fine and plays fine in the source window but wont appear on the timeline, if I drag the imported composition to the new sequence button, it creates the sequence with all the correct settings but wont let me drag the composition onto it.

The reason why I want to bring the video back into Premiere is because I then want to add some screen recording in various places.  I suppose I could go at this a couple of different ways i.e. render the footage from After Effects, or edit video and screen recording in Premiere and then use keyframes to control what the colour correction and camera shake applies to.

To me my method seems logical, its just weird why Premiere wont let me add the composition to the timeline but plays it fine in the source window.

Thanks for clearing that up for me Jim, seems a shame that you can't fully round trip; maybe something that Adobe might look at in CS6

I see what you mean; I guess it just bugs me that it works fine in the source window but wont extend that to making another sequence

Anyways as you say about the replace command; I used that earlier to complete my project so instead of complaining about my flawed logic, I shall adjust my workflow

Thanks again!