[Plugin: WordPress Importer] Not working

Hi there.
I’m running two websites, both with a blog. Some of the blog posts need to be posted on both websites. I previously used the official WordPress Importer (version 0.6.1) tool for this. But now it doesn’t seem to work anymore, aargh! ??

I don’t receive any error message, it actually tells me the import succeeded, however, the imported posts doesn’t show between the other posts.

What could possibly be the problem?