I use the third party vbulletin 4 importer. I have successfully imported the usergroups, forums, users, avatars, private messages (1/4 million!) and now whenever I import either "profile comments" or "threads/posts" which are the only options for me now, I get a "504 Gateway Time-out". I am not redirected to any page - as I think, as my board is rather large. Do you have any idea how to resolve this issue?