Was the connection working previously?
Is the Myfxbook EA attached to a chart?
Please double check the settings are correct.
Make sure that the Myfxbook EA is attached to a chart and the login credentials are correct.
Check the 'Experts' tab for any errors.
Also make sure you see the deposits in your History tab in MetaTrader - if not, please refer here: Missing History.
Please attach the Myfxbook EA to a chart and fill in the correct details.