Which board has a non-w3t_ prefix, the test board or the production board?
One thing to watch out for: there may still be some places in the scripts that incorrectly have "w3t_" hardcoded, instead of using the configuration variable $config['tbprefix']. If you're using a prefix other than "w3t_", it would be a good idea to search all the script files for "w3t"; use the Linux grep command, the Windows search function, or an equivalent utility to do this.