zero divide in 'MagicKeys.mq4' (1776,57)

1. Sometimes it DIDN'T WORK , it just freezed, and I have to restart all things, why is that happening?
and it appear AT THE LOG FILE:

1 22:00:00.169 MagicKeys GBPCAD,M5: zero divide in 'MagicKeys.mq4' (1776,57)

2. And sometimes when I press F3, F4 to change Timeframe, it froze again! The log file were:

1 16:13:21.151 MagicKeys GBPAUD,M30: array out of range in 'MagicKeys.mq4' (1204,44)

konzern618 hello, zero divide is an error that occurs when account balance is null. Is that the case?

It might also happen when the expert advisor is initialized before connection to broker is established and it might depend on your connection speed