[AndreT]

Start off by saying which MySQL plugin and what version of it you're using. Then, open up the server_log.txt file and the MySQL log file. That should give you enough information if you have some debugging enabled in your script. Also make sure you have correct plugin version in your remote server's plugins folder!

Here's something very helpful in most cases: https://sampforum.blast.hk/showthread.php?tid=262796