Problem Importing MT in WP1.5

I just downloaded WP and installed it. I exported my file from MT (v2.66), converted it to UTF-8 in Notepad, uploaded it, edited import-mt.php. So it should work, right? I go import-mt.php. Looks the same… I click on the “Let’s Go!” link, Firefox shows activity for about half a second and it just stops. What’s going on here? I thought it might be file permissions, since the files (while all world readable) are owned by a user different than Apache. chmod 777 didn’t help… Any ideas?