I have two sheet metal parts that will not create a flat pattern view in drawings. They will unfold in their part file, but not in a drawing. When I drag the flat pattern into a drawing view, it just keept its folded shape. Both parts started from the same base feature, so they have that in common. I even recreated the parts from scratch and they do the same thing.

I have several other sheet metal parts in the same project and they all unfold fine.

How can I create a flat pattern view with these parts?

Files attached.

Google Drive Links to part files:

https://drive.google.com/file/d/0B8KVvS6tGzv_NzNfNWhvSVR3ckE/edit?usp=sharing
https://drive.google.com/file/d/0B8KVvS6tGzv_TEZiQXBMNVNWdWc/edit?usp=sharing