The .rar file appears to be damaged, so I couldn't open it.
The other thing you may have to do...can't recall if it is needed or not, but if there is an existing movies.xml file in the database directory, delete it so XAnt is forced to rebuild a new one.
I will try out your ini file to see what happens with that.
Opps...my mistake....this rar is the dll....meaning rename the extension from .rar to .dll...GEESSS!! I guess I had a few loose marbles this morning.
Just tried the .ini file on its own and it built the xml fine. So the ini file is correct. Then tried your .dll with the ini and it too built the xml fine, so your files are correct. Now as mentioned by badubo, are your directory structures correct (I know you indicate this in your first post, but it doesn't hurt to double check).