AttachMovie images look pixelated

I’m using this actionscript:



_root.container.attachMovie(etc);


There is nothing in the container movieclip and I am attaching flash movieclips from the library with a linkage name.

The problem is that once the movieclips are attached their contents look quite messy - not pixalated but text etc looks jagged as if they have been resized.

Any ideas how to get them to show cleanly?