Yes I solved it. Lots of people say, that it's enought ot put: this._lockroot = true in AS2 file but it's not true.

If you want to load AS2 files with Tweener into AS3, you must put your AS2 file into a container, for example:

file: as2.swf - have a as2 data with Tweener
file: as2cont.swf - have a as2 loader, which loads as2.swf (cannot import any Tweener libs)
file: as3.swf - loads as2cont.swf, which loads as2.swf

Sorry for my english. Thats only solution, which I know.