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Sounds like when you copied your site over you missed some things or the file permissions got messed up. This can happen if you FTP from a windows machine to a Linux server or vice versa. I would suggest trying to do this again.
You may find it easier to zip up your files from the local site, upload them and then unzip them on the server.
I have had issues in the past when trying to ftp all of the files. I haven't had as much of an issue if I compress the files, transfer them and then decompress the files. Ends up being much faster as well.
You may also want to verify that your database truly has the same data in it. I have also had issues in the past when my export did not include the whole database due to size limitations on the export file. If you have this issue you may have to limit the number of tables you export at a time.