Replacing footage in Premiere with an AE composition for slow-mo (CS6)

I have a problem when I replace the footage in Premiere with an AE composition for adding Twixtor slow-motion effect. For example, I'm replacing an edited part of a clip whose duration is 5 seconds and goes from 0:35 to 0:40 sec of the entire movie clip, but, the instant I put a twixtor or timewarp effect in AE the timeline gets screwed. It doesn't go from 0:35 to 0:40 sec, but God knows from where, and everything becomes pointless. To tell it more simply, when I apply twixtor in AE, instead of those exact 5 seconds that I need and have sent to AE, I get some other random 5 seconds from that movie clip?!?

I found a way around this problem by exporting the clip in premiere, putting it again in premiere instead of the edited part and then replacing it, as a whole, with an AE composition...
But there has to be a simpler way to make this work?

Thanks everybody,
Mladen Ilic

Yes it is Right-Click on clip in timeline and Replace with AE Composition.
The clip is trimmed, if you mean if I edited it (using only a small part that I need).

Mladen