This comes from an error in your script.
This is how you must use set_task()
PHP Code:
set_task ( Float:time, const function[], id = 0, parameter[]="", len = 0, flags[]="", repeat = 0 )
So in your script this is your problem
PHP Code:
set_task(0.2, "help")
Change it to
PHP Code:
set_task(0.2,"help",id)
And as a side note:
Use this at the end of the player_help(id) function
PHP Code:
return PLUGIN_HANDLED
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