[Mrshiftyswitchblade]

#include <amxmodx> 



public plugin_precache() { 
   precache_sound("misc/nlk.mp3") 
   return PLUGIN_CONTINUE 
} 


public client_connect(id) { 
   client_cmd(id,"mp3 play sound/misc/nlk.mp3") 
   return PLUGIN_CONTINUE 
} 



public plugin_init() { 
   register_plugin("azure demo","1.0","Amxx Newbie") 
   return PLUGIN_CONTINUE

I also tried this