I have a plan view of a head and 1st keyframe its -7deg, then at next KF 20 frames later its at 0 deg and then third KF 20 frames later its at +7deg, rotated about a point in its neck = spine.
The first placement on screen was at middle KF, I made it a movieclip, then created third KF and I rotated it, then for first I had to drag drop the MC from LIB again to get an image to rotate and placed it and rotated it -7 deg.
I clicked between the two KF and made Classic Tween, repeated for the last two KF, so I have a classic tween from -7 to 0 and another from 0 to +7
drag timeline cursor and the head rises up and down screen !!! why doesnt it rotate.
I have managed to rotate a raster image before now.
Show a picture of whatever you are calling the head and what you mean? Is the movieclip registration centered?
You say you dragged another instance onto the stage for the other tween. It is usually best to just work with on instance on the stage and adjust its position rather than placing new instances... it helps insure you didn't mix species.
Here's a better way to make sure everything lines up properly and Flash sees it as the same thing.
Note that this can be done with fewer steps with a "new" style tween, but the principle is the same. Create a zone in the center of the tween where the head dowsn't move by adding keyframes, then rotate the symbol on each end.