When the server is going to crash, plugin no_ips reports this error:
L 09/29/2011 - 00:56:56: [AMXX] Plugin "no_ips.amxx" failed to load: Module/Library "regex" required for plugin. Check modules.ini.
Tried adding the regex module but it still crashes without reporting the error. Also tried removing the plugin and still the same.
I'll try amx_off but I doubt it will work since it only pauses plugins.