A month ago I ran into this problem but thought maybe it was my old machine so i moved it to my web server and it worked just fine. I now have a new fast machine and the same problem persists. I installed Xenforo locally for testing addons etc... I need a few threads and users to see how stuff looks in posts threads, forums, etc... I restore an old vBulletin backup i have to import. again no problem importing my database locally. When I go to tools to import the data it will not take the database prefix. even though I am 1000% sure everything is correct. Been working with databases for 10 years i know how to set them up find prefixes etc.. It is correct yet it will not take the prefix. Is this a windows thing? Any work around?