Migrator for Wordpress

I have wordpress xml exports I am trying to import. I have them in the correct location, select the correct file, choose the blogger to import as and hit the migrate button. My issue is that it takes a long time to import.

Is there a limit to the size of the xml file?
Mine range from 50kb to 4mb. They seem to hang on the larger ones, even though the gear keeps spinning.

Also is there a way to import the hits number?

Thanks