General :: Android Reset Lock Screen

The boy was set to release by drawing on the screen. Now after he has made ​​a number of attempts is displayed when the message "Too many attempts to enter the sequence" and requires the google account. The problem is that you do not remember your credentials, or because you do not connect to the wifi network is not able to validate credentials.To get around this I did the following tests:

1) attempt to enter the recovery mode by pressing volume + and power
2) attempt via adb with the command "adb reboot recovery"
But every time you restart it is as if there is no recovery mode and starts normally and returns the usual screen that asks for credentials.

I also run this procedure:
> Adb-d shell
# Sqlite3 data / data / com.android.providers.settings / databases / settings.db
sqlite> update system set value = 0 where name = 'lock_pattern_autolock';
sqlite>. exit
# exit

but when I reboot I get the same error message with the introduction of the credentials.