Without the error you get I can't do allot 
Assuming you didn't forget to put it in the post: did you create the ScheduleTable table?
worktycho implented a cWorld:ScheduleTask function. You could try to use that instead. I have no idea how to use it yet though ;(
EDIT:
Ah you now posted the error now
I think you should change if ScheduleTable[I][4] to ScheduleTable[I][3].
Because when you create a table using braces well.. Let me try to show it:
Assuming you didn't forget to put it in the post: did you create the ScheduleTable table?worktycho implented a cWorld:ScheduleTask function. You could try to use that instead. I have no idea how to use it yet though ;(
EDIT:
Ah you now posted the error now
I think you should change if ScheduleTable[I][4] to ScheduleTable[I][3].
Because when you create a table using braces well.. Let me try to show it:
local Table = {12, 43, 13}
Index: 1 2 3