[oFFiCiaLBr]

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Loaded log file: "server_log.txt".
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SA-MP Dedicated Server
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v0.3z, ©2005-2014 SA-MP Team

[20:36:47]
[20:36:47] Server Plugins
[20:36:47] --------------
[20:36:47] Loading plugin: mysql
[20:36:47]

> MySQL plugin R5 successfully loaded.

[20:36:47] Loaded.
[20:36:47] Loading plugin: nativechecker
[20:36:47] Loaded.
[20:36:47] Loaded 2 plugins.

[20:36:47]
[20:36:47] Filterscripts
[20:36:47] ---------------
[20:36:47] Loaded 0 filterscripts.

[20:36:47] Error: Function not registered: 'mysql_format'
[20:36:47] Error: Function not registered: 'mysql_log'
[20:36:47] Error: Function not registered: 'mysql_tquery'
[20:36:47] Error: Function not registered: 'cache_get_data'
[20:36:47] Error: Function not registered: 'cache_get_field_content'
[20:36:47] Error: Function not registered: 'mysql_escape_string'
[20:36:47] Script[gamemodes/w3op.amx]: Run time error 19: "File or function is not found"
[20:36:47] Number of vehicle models: 0

[Konstantinos]

The gamemode uses one of the latest versions for mysql plugin and you loaded R5 which is very old. Try loading R38 which is the latest one.