New Post: Export issue

Hi everyone,
i've got an issue when i try to export product/ categories ecc....well everything exportable from the "export" page.
But i can export settnings without problem. The error that i've got it's like " path not supported" but when i try to export settings everything's fine. The site show me a pop-up to download the XML export file.
I've already tried to use a different browser (usually i use mozilla) but this appens with every browser i use.

Thanks
Andrea