[Extremo]

Right,

I tested the gamemode and it works fine . I can start it properly etc, didn't join the game tho. So the problem must be on your side. Are you sure you have the plugins folder in your sa-mp server directory? Are you sure you have "plugins sampmysql" in your server.cfg?

Do you have libmysql.dll in your MAIN sa-mp server directory?

If you do have all of the above, then the problem must be something related to the plugin maybe. Did you download the latest plugin?
You can find it here: PLUGIN

If that's not the case, there must be something that's not properly setup at your PC. Sadly, I cannot assist you more then that, as my knowledge further is limited. All I can tell you is that installing .NET framework etc might assist you with your problem, if its already installed - re-install it.

You should also, depending on your OS, upgrade your service package.

Further more I can only suggest you to find a good forum with people that know windows like their pocket, I am sure they can assist you way better as I use linux

Regards,
Extremo.