Create new upload, fill in text and choose file to upload and nothing is happened. A new entry will be created, but it's not possible to upload any file.
You should consider upgrading your vBulletin version. The issue was partly due to not reimporting the new XML and partly because of the way vBulletin parses template syntax in your version of vBulletin. I've made a workaround for you but any updates of downloads will break this.