tobanga said:
Sorry for bugging you, but I'm getting this error here:

Invalid duration specification for ss: 00:00:00:00
You entered 00:00:00:00 ?

If so, I think that's not the correct format.
If you want to do milliseconds, separate it with a period.
You could just enter 0 in this case. You don't need to explicitly enter every leading zero or trailing post-decimal 0.